Given the following AH values, calculate AH for the reaction 6 CO, + 6 H,0 → C,H12O6 + 6 Oz AH; keal'mol kJ³/mol CO, H,O - 304.7 - 94.0 - 68.4 - 1274.9 - 393.3 - 286.2 * AH, is the energy evolved to produce a compound from its elements. *1 kcal is the energy required to raise the temperature of 1000 g of water 1°C. * The joule (J) is a unit of energy that is gradually replacing the calorie (cal) in scientific usage. One calorie is equal to 4.184 joules.
Given the following AH values, calculate AH for the reaction 6 CO, + 6 H,0 → C,H12O6 + 6 Oz AH; keal'mol kJ³/mol CO, H,O - 304.7 - 94.0 - 68.4 - 1274.9 - 393.3 - 286.2 * AH, is the energy evolved to produce a compound from its elements. *1 kcal is the energy required to raise the temperature of 1000 g of water 1°C. * The joule (J) is a unit of energy that is gradually replacing the calorie (cal) in scientific usage. One calorie is equal to 4.184 joules.
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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In the solved Problem 4.1, what is the equation used to solve ΔH of reaction? Why is the heat of reaction endothermic?
![Given the following AH values, calculate AH for the reaction
PROBLEM 4.1
6 CO, + 6 H20 –→ CH]½O6 + 6 O;
AH;
kcal/mol
kJ*/mol
- 304.7
- 94.0
- 68.4
- 1274.9
- 393.3
- 286.2
CO,
H,O
* AH, is the energy evolved to produce a compound from its elements.
*1 kcal is the energy required to raise the temperature of 1000 g of water 1°C.
* The joule (J) is a unit of energy that is gradually replacing the
calorie (cal) in scientific usage. One calorie is equal to 4.184 joules.
Solution
The total enthalpy for a reaction is equal to the sum of enthalpy values of the prod-
ucts minus those of the reactants.
6 CO, +
6 H,0
C,H12O6 + 6 0,
- 1274.9 + 6(0)
- 1274.9
6(-393.3) + 6(-286.2)
-2359.8 + (-1717.2)
AH = -1274.9 – (-4077.0) = 2802.1 kJ/mol
The positive AH indicates that the reaction is endothermic.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F97db6dde-e412-4e8c-8448-8887ba039cfd%2Fe312c588-d78b-4c96-b8ab-1c66c0b4effd%2Ff9z6ihe_processed.png&w=3840&q=75)
Transcribed Image Text:Given the following AH values, calculate AH for the reaction
PROBLEM 4.1
6 CO, + 6 H20 –→ CH]½O6 + 6 O;
AH;
kcal/mol
kJ*/mol
- 304.7
- 94.0
- 68.4
- 1274.9
- 393.3
- 286.2
CO,
H,O
* AH, is the energy evolved to produce a compound from its elements.
*1 kcal is the energy required to raise the temperature of 1000 g of water 1°C.
* The joule (J) is a unit of energy that is gradually replacing the
calorie (cal) in scientific usage. One calorie is equal to 4.184 joules.
Solution
The total enthalpy for a reaction is equal to the sum of enthalpy values of the prod-
ucts minus those of the reactants.
6 CO, +
6 H,0
C,H12O6 + 6 0,
- 1274.9 + 6(0)
- 1274.9
6(-393.3) + 6(-286.2)
-2359.8 + (-1717.2)
AH = -1274.9 – (-4077.0) = 2802.1 kJ/mol
The positive AH indicates that the reaction is endothermic.
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