25) Consider the hypothetical reaction: X(g) + 2Y(g) → XY2g), A[Y] =-5.0×102 mol.L'.sec¹ At What is the rate of formation of XY2(g) a) 5.0 × 102 mol L-¹ sec¹ c) 1.0 × 102 mol L¹ sec¹ b)-2.5 x 102 mol L-¹ sec¹ d) 2.5 x 102 mol L¹ sec¹
25) Consider the hypothetical reaction: X(g) + 2Y(g) → XY2g), A[Y] =-5.0×102 mol.L'.sec¹ At What is the rate of formation of XY2(g) a) 5.0 × 102 mol L-¹ sec¹ c) 1.0 × 102 mol L¹ sec¹ b)-2.5 x 102 mol L-¹ sec¹ d) 2.5 x 102 mol L¹ sec¹
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter10: Entropy And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 10.8PAE: In the thermodynamic definition of a spontaneous process, why is it important that the phrase...
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Q 25 please
![21)
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27)
Which one of the following statements is true at constant pressure and temperature?
a) AH = AE - PAV.
c) AH = AE+RTAng
The enthalpy can be defined as
a) H= AE + PV
c) H=E+ PV
What is the entropy of the following arrangement (3 left and 1 right) in the box having four molecules?
KB= 1.38×10-23 J/K,
a) 1.91x10-23 J/K
c) 8.56×10-23 J/K
28)
Calculate boiling point of a liquid,
16 J/mole?
a) 273 K
b) AE=AH+PAV
d) AE = AH+RTAng
b) H= E + APV
d) H=E-PV
b) 9.42×10-23 J/K
d) 1.56×10-23 J/K
enthalpy of vaporization is 6 KJ/mole and entropy change
c) 375 K
abs
d) 273 °C
b) 375 °C
Consider the hypothetical reaction: X(g) + 2Y(g) →→ XY2g),
A[Y]
At
What is the rate of formation of XY2(g)
a) 5.0 x 10-2 mol L-¹ sec¹
c) 1.0 x 102 mol L¹ sec¹
=-5.0×102 mol.L'.sec¹
Which is the correct rate law?
a) ratek [A] [B]
c) ratek [A] [B]
b) -2.5 × 10-² mol L-¹ sec¯¹
d) 2.5 × 102 mol L-¹ sec¹
How does a catalyst increase the rate of a chemical reaction?
a) By changing the magnitude of the enthalpy change.
b) By providing a pathway for the reaction that has a lower activation energy.
c) By decreasing the potential energy of the products
d) By increasing the potential energy of the reactants
The rate of a chemical reaction will be increased by all of the following factors EXCEPT
a) the presence of a high activation energy
c) an increase in temperature
For the next 3 questions, use the proposed mechanism for a given chemical reaction shown below.
Step 1: A + B
F (fast)
Step 2: F+ A
C+ G (slow)
Step 3: G+AC+D (fast)
b) the presence of a catalyst
d) increasing the concentration of the reactant
b) rate=k [A] [B] [F] [G]
d) rate = k [A] [B]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff271c2b3-8ff2-44d4-b255-fd41773a1095%2F1b80924a-4a26-4b57-b2a3-16dd0ae74354%2Fx2qce9m_processed.jpeg&w=3840&q=75)
Transcribed Image Text:21)
22)
23)
24)
25)
26)
27)
Which one of the following statements is true at constant pressure and temperature?
a) AH = AE - PAV.
c) AH = AE+RTAng
The enthalpy can be defined as
a) H= AE + PV
c) H=E+ PV
What is the entropy of the following arrangement (3 left and 1 right) in the box having four molecules?
KB= 1.38×10-23 J/K,
a) 1.91x10-23 J/K
c) 8.56×10-23 J/K
28)
Calculate boiling point of a liquid,
16 J/mole?
a) 273 K
b) AE=AH+PAV
d) AE = AH+RTAng
b) H= E + APV
d) H=E-PV
b) 9.42×10-23 J/K
d) 1.56×10-23 J/K
enthalpy of vaporization is 6 KJ/mole and entropy change
c) 375 K
abs
d) 273 °C
b) 375 °C
Consider the hypothetical reaction: X(g) + 2Y(g) →→ XY2g),
A[Y]
At
What is the rate of formation of XY2(g)
a) 5.0 x 10-2 mol L-¹ sec¹
c) 1.0 x 102 mol L¹ sec¹
=-5.0×102 mol.L'.sec¹
Which is the correct rate law?
a) ratek [A] [B]
c) ratek [A] [B]
b) -2.5 × 10-² mol L-¹ sec¯¹
d) 2.5 × 102 mol L-¹ sec¹
How does a catalyst increase the rate of a chemical reaction?
a) By changing the magnitude of the enthalpy change.
b) By providing a pathway for the reaction that has a lower activation energy.
c) By decreasing the potential energy of the products
d) By increasing the potential energy of the reactants
The rate of a chemical reaction will be increased by all of the following factors EXCEPT
a) the presence of a high activation energy
c) an increase in temperature
For the next 3 questions, use the proposed mechanism for a given chemical reaction shown below.
Step 1: A + B
F (fast)
Step 2: F+ A
C+ G (slow)
Step 3: G+AC+D (fast)
b) the presence of a catalyst
d) increasing the concentration of the reactant
b) rate=k [A] [B] [F] [G]
d) rate = k [A] [B]
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