Solve the following problems below as assigned by your group number. Then, move to your letter group and check your answers to see if all groups came up with the same answer. If your answers are different, work together to try and figure out what the correct solutions should be. 1. Ethanol can be created by reacting hydrogen gas, carbon, and oxygen together. Using the following thermochemical data, find AH for the reaction 6H2(g) + 4C(s) + 0:(g) → 2C;H;OH(1). 1. C,H;OH (1) + 3 02 (g) →2 CO, (g) + 3 H,0 (1) AH = -875.1 kJ 2. C (s) + 02 (g) →CO: (g) AH = -394.5 kJ 3. H2 (g) + ½ 02 (g) →H,0 (1) AH = -285.8 kJ
Solve the following problems below as assigned by your group number. Then, move to your letter group and check your answers to see if all groups came up with the same answer. If your answers are different, work together to try and figure out what the correct solutions should be. 1. Ethanol can be created by reacting hydrogen gas, carbon, and oxygen together. Using the following thermochemical data, find AH for the reaction 6H2(g) + 4C(s) + 0:(g) → 2C;H;OH(1). 1. C,H;OH (1) + 3 02 (g) →2 CO, (g) + 3 H,0 (1) AH = -875.1 kJ 2. C (s) + 02 (g) →CO: (g) AH = -394.5 kJ 3. H2 (g) + ½ 02 (g) →H,0 (1) AH = -285.8 kJ
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Could you explain question 1 on my practice sheet? thank you
![What needs to cancel out completely? _
Final
AH =
Let's revisit our demo. What was the heat of formation for Mg0?
There's another way for us to come up with the same equation and change in enthalpy using 3 steps.
1. Mg (s) + 2HCI (aq) → MgCl, (aq) + H2 (g)
AH = -452 kJ
2. Mgo (s) + 2HCI (aq) → MgCl, (aq) + H,0 (1)
AH = -126 kJ
3. H2 (g) + ½0, (g) → H,0 (1)
AH = -286 kJ
Hess's Law Group Practice
GROUP:
Solve the following problems below as assigned by your group number. Then, move to your letter group and check
your answers to see if all groups came up with the same answer. If your answers are different, work together to try
and figure out what the correct solutions should be.
1. Ethanol can be created by reacting hydrogen gas, carbon, and oxygen together. Using the following thermochemical data,
find AH for the reaction 6H;(g) + 4C(s) + 02(g) → 2C,H;0H(1).
1. C,H;OH (1) + 3 0, (g) →2 CO; (g) + 3 H,0 (1)
AH = -875.1 kJ
2. C (s) + 02 (g) →CO; (g)
AH = -394.5 kJ
3. H; (g) + ½ 0; (g) →H¸0 (1)
AH = -285.8 kJ
2. Calculate AH for the reaction 4NH; (g) + 50, (g) → 4NO (g) + 6H;0 (g), from the following data.
1. N2 (g) + 0, (g) →2 NO (g)
AH = -180.5 kJ
2. N2 (g) + 3 H2 (g) →2 NH; (g)
AH = -91.8 kJ
3. 2 H; (g) + 02 (g) →2 H,0 (g)
AH = -483.6 kJ
3. Calculate AH for the reaction Mg (s) + N2 (g) + 30, (g) → Mg(NO;): (s) given the following data.
1. Mg,N2 (s) →3 Mg (s) + N2 (g)
AH = +463 kJ
2. 2 Mg (s) + 0, (g) → 2 MgO (s)
AH = -1203 kJ
3. 8 Mg (s) + Mg(NO,): (s) → Mg,N; (s) + 6 MgO (s)
AH = -3884 k]
CHALLENGE PROBLEM (If time permits)
One reaction involving the conversion of iron ore to iron metal is Feo (s) + CO (g) → Fe (s) + CO, (g)
Calculate AH for the reaction given the following data.
4.
1. 3Fe,0, (s) + CO (g) →2FE,0, (s) + CO, (g)
AH = -47.0 kJ
2. Fe,0; (s) + 3CO (g) →2FE (s) +3 CO2 (g)
AH = -25.0 kJ
3. Fe,0, (s) + CO (g) →3Fe0 (s) + CO2 (g)
AH = +19.0 kJ](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F79e7eefe-8745-42e5-a1d9-5bd5d5e9e0b9%2Ff0e5ebf5-db4e-4afc-97ee-13f240468a7f%2F487v7gl_processed.jpeg&w=3840&q=75)
Transcribed Image Text:What needs to cancel out completely? _
Final
AH =
Let's revisit our demo. What was the heat of formation for Mg0?
There's another way for us to come up with the same equation and change in enthalpy using 3 steps.
1. Mg (s) + 2HCI (aq) → MgCl, (aq) + H2 (g)
AH = -452 kJ
2. Mgo (s) + 2HCI (aq) → MgCl, (aq) + H,0 (1)
AH = -126 kJ
3. H2 (g) + ½0, (g) → H,0 (1)
AH = -286 kJ
Hess's Law Group Practice
GROUP:
Solve the following problems below as assigned by your group number. Then, move to your letter group and check
your answers to see if all groups came up with the same answer. If your answers are different, work together to try
and figure out what the correct solutions should be.
1. Ethanol can be created by reacting hydrogen gas, carbon, and oxygen together. Using the following thermochemical data,
find AH for the reaction 6H;(g) + 4C(s) + 02(g) → 2C,H;0H(1).
1. C,H;OH (1) + 3 0, (g) →2 CO; (g) + 3 H,0 (1)
AH = -875.1 kJ
2. C (s) + 02 (g) →CO; (g)
AH = -394.5 kJ
3. H; (g) + ½ 0; (g) →H¸0 (1)
AH = -285.8 kJ
2. Calculate AH for the reaction 4NH; (g) + 50, (g) → 4NO (g) + 6H;0 (g), from the following data.
1. N2 (g) + 0, (g) →2 NO (g)
AH = -180.5 kJ
2. N2 (g) + 3 H2 (g) →2 NH; (g)
AH = -91.8 kJ
3. 2 H; (g) + 02 (g) →2 H,0 (g)
AH = -483.6 kJ
3. Calculate AH for the reaction Mg (s) + N2 (g) + 30, (g) → Mg(NO;): (s) given the following data.
1. Mg,N2 (s) →3 Mg (s) + N2 (g)
AH = +463 kJ
2. 2 Mg (s) + 0, (g) → 2 MgO (s)
AH = -1203 kJ
3. 8 Mg (s) + Mg(NO,): (s) → Mg,N; (s) + 6 MgO (s)
AH = -3884 k]
CHALLENGE PROBLEM (If time permits)
One reaction involving the conversion of iron ore to iron metal is Feo (s) + CO (g) → Fe (s) + CO, (g)
Calculate AH for the reaction given the following data.
4.
1. 3Fe,0, (s) + CO (g) →2FE,0, (s) + CO, (g)
AH = -47.0 kJ
2. Fe,0; (s) + 3CO (g) →2FE (s) +3 CO2 (g)
AH = -25.0 kJ
3. Fe,0, (s) + CO (g) →3Fe0 (s) + CO2 (g)
AH = +19.0 kJ
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