(a) To determine: The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is C 2 H 4 ( g ) + 2 C l ( g ) → C 2 H 2 C l 4 ( l ) + H 2 ( g ) : C 2 H 2 C l 4 ( l ) → C 2 H C l 3 ( l ) + H C l ( g ) ; Δ H ∘ r = − 385.76 k J in words. Concept introduction: At room temperature and 1 atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation. The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs. During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions. The total energy change can be calculated as summation of energy change occurring at every step.

Question

A flash drum at 1.0 atm is separating a feed consisting of methanol and water. If the feed rate is 2000 kg/h and the feed is 45 wt % methanol, what are the values of L (kg/h), V (kg/h), yM, xM (weight fractions), and Tdrum if 35% by weight of the feed is vaporized? VLE data are in Table 2-8.

Answer 1

Question

Chapter 9, Problem 9.8P

Interpretation Introduction

(a)

To determine:

The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is

C2H4(g)+2Cl(g)→C2H2Cl4(l)+H2(g):C2H2Cl4(l)→C2HCl3(l)+HCl(g); ΔH∘r=−385.76kJ in words.

Concept introduction:

At room temperature and 1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(b)

To determine:

The standard heat of reaction for given reaction should be determined by use of Hess’s law. The given reaction is as follow:

C2H4(g)+2Cl2(g)→C2HCl3(l)+H2(g)+HCl(g).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(c)

To solve:

The heat is evolved or absorbed should be found for the given process.

Concept introduction:

At room temperature and

1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(d)

To find:

The effect of temperature change from 400C to 250C should be determined for solution of part (c).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

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A flash drum at 1.0 atm is separating a feed consisting of methanol and water. If the feed rate is 2000 kg/h and the feed is 45 wt % methanol, what are the values of L (kg/h), V (kg/h), yM, xM (weight fractions), and Tdrum if 35% by weight of the feed is vaporized? VLE data are in Table 2-8.

Q1.B. Make a comparison between current control PWM rectifier in the abc reference frame and dq reference frame.

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Answer 2

Question

Chapter 9, Problem 9.8P

Interpretation Introduction

(a)

To determine:

The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is

C2H4(g)+2Cl(g)→C2H2Cl4(l)+H2(g):C2H2Cl4(l)→C2HCl3(l)+HCl(g); ΔH∘r=−385.76kJ in words.

Concept introduction:

At room temperature and 1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(b)

To determine:

The standard heat of reaction for given reaction should be determined by use of Hess’s law. The given reaction is as follow:

C2H4(g)+2Cl2(g)→C2HCl3(l)+H2(g)+HCl(g).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(c)

To solve:

The heat is evolved or absorbed should be found for the given process.

Concept introduction:

At room temperature and

1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(d)

To find:

The effect of temperature change from 400C to 250C should be determined for solution of part (c).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

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Answer 3

Question

Chapter 9, Problem 9.8P

Interpretation Introduction

(a)

To determine:

The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is

C2H4(g)+2Cl(g)→C2H2Cl4(l)+H2(g):C2H2Cl4(l)→C2HCl3(l)+HCl(g); ΔH∘r=−385.76kJ in words.

Concept introduction:

At room temperature and 1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(b)

To determine:

The standard heat of reaction for given reaction should be determined by use of Hess’s law. The given reaction is as follow:

C2H4(g)+2Cl2(g)→C2HCl3(l)+H2(g)+HCl(g).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(c)

To solve:

The heat is evolved or absorbed should be found for the given process.

Concept introduction:

At room temperature and

1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(d)

To find:

The effect of temperature change from 400C to 250C should be determined for solution of part (c).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

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Answer 4

Question

Chapter 9, Problem 9.8P

Interpretation Introduction

(a)

To determine:

The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is

C2H4(g)+2Cl(g)→C2H2Cl4(l)+H2(g):C2H2Cl4(l)→C2HCl3(l)+HCl(g); ΔH∘r=−385.76kJ in words.

Concept introduction:

At room temperature and 1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(b)

To determine:

The standard heat of reaction for given reaction should be determined by use of Hess’s law. The given reaction is as follow:

C2H4(g)+2Cl2(g)→C2HCl3(l)+H2(g)+HCl(g).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(c)

To solve:

The heat is evolved or absorbed should be found for the given process.

Concept introduction:

At room temperature and

1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(d)

To find:

The effect of temperature change from 400C to 250C should be determined for solution of part (c).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

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Answer 5

Chapter 9, Problem 9.8P

Interpretation Introduction

(a)

To determine:

The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is

C2H4(g)+2Cl(g)→C2H2Cl4(l)+H2(g):C2H2Cl4(l)→C2HCl3(l)+HCl(g); ΔH∘r=−385.76kJ in words.

Concept introduction:

At room temperature and 1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(b)

To determine:

The standard heat of reaction for given reaction should be determined by use of Hess’s law. The given reaction is as follow:

C2H4(g)+2Cl2(g)→C2HCl3(l)+H2(g)+HCl(g).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(c)

To solve:

The heat is evolved or absorbed should be found for the given process.

Concept introduction:

At room temperature and

1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Interpretation Introduction

(d)

To find:

The effect of temperature change from 400C to 250C should be determined for solution of part (c).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 6

Chapter 9, Problem 9.8P

Interpretation Introduction

(a)

To determine:

The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is

C2H4(g)+2Cl(g)→C2H2Cl4(l)+H2(g):C2H2Cl4(l)→C2HCl3(l)+HCl(g); ΔH∘r=−385.76kJ in words.

Concept introduction:

At room temperature and 1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 7

Chapter 9, Problem 9.8P

Interpretation Introduction

(a)

To determine:

The standard heat of formation of tetrachloroethane and standard heat of second reaction should be determined. The given equation is

C2H4(g)+2Cl(g)→C2H2Cl4(l)+H2(g):C2H2Cl4(l)→C2HCl3(l)+HCl(g); ΔH∘r=−385.76kJ in words.

Concept introduction:

At room temperature and 1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 8

Interpretation Introduction

(b)

To determine:

The standard heat of reaction for given reaction should be determined by use of Hess’s law. The given reaction is as follow:

C2H4(g)+2Cl2(g)→C2HCl3(l)+H2(g)+HCl(g).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 9

Interpretation Introduction

(b)

To determine:

The standard heat of reaction for given reaction should be determined by use of Hess’s law. The given reaction is as follow:

C2H4(g)+2Cl2(g)→C2HCl3(l)+H2(g)+HCl(g).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 10

Interpretation Introduction

(c)

To solve:

The heat is evolved or absorbed should be found for the given process.

Concept introduction:

At room temperature and

1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 11

Interpretation Introduction

(c)

To solve:

The heat is evolved or absorbed should be found for the given process.

Concept introduction:

At room temperature and

1atm pressure, the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called as the heat of formation.

The term Enthalpy exchange is also used when formation of one mole of compound from its constituent elements occurs.

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 12

Interpretation Introduction

(d)

To find:

The effect of temperature change from 400C to 250C should be determined for solution of part (c).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 13

Interpretation Introduction

(d)

To find:

The effect of temperature change from 400C to 250C should be determined for solution of part (c).

Concept introduction:

During any chemical reaction, when energy changes it is called as the state function according to Hess’s law. This state of function is defined as the energy changes in chemical reactions are same for any kind of reactions like one step reaction or several step reactions.

The total energy change can be calculated as summation of energy change occurring at every step.

Answer 14

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Answer 25

Ch. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.2P Ch. 9 - Prob. 9.3P Ch. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.5P Ch. 9 - Prob. 9.6P Ch. 9 - Prob. 9.7P Ch. 9 - Prob. 9.8P Ch. 9 - The standard heat of combustion of gaseous ethane...Ch. 9 - The standard heat of combustion (AH°) of liquid...

Solution Summary: The author explains how the heat required to absorb or evolve that leads to formation of one mole of compound from its constituent element is called heat of formation.

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Chapter 9 Solutions