
Concept explainers
(a)
Interpretation:
The standard enthalpy change for the given “cracking” reaction has to be calculated
Concept Introduction:
Enthalpy of reaction: (
The enthalpy of a reaction is calculated by subtracting the heat of formation of reactatns from heat of formation of products.
(a)

Answer to Problem 21.123QP
The standard enthalpy change for the given “cracking” reaction is
Explanation of Solution
Given data:
The given cracking reaction is:
To Calculate: The standard enthalpy change for the given “cracking” reaction.
Using the Appendix C, the heat of formation (
The
Hence, the standard enthalpy change is
The standard enthalpy change for the given “cracking” reaction is calculated as
(b)
Interpretation:
The standard enthalpy change for the given “cracking” reaction has to be calculated
Concept Introduction:
Enthalpy of reaction: (
The enthalpy of a reaction is calculated by subtracting the heat of formation of reactatns from heat of formation of products.
(b)

Answer to Problem 21.123QP
The standard enthalpy change for the given “cracking” reaction is
Explanation of Solution
Given data:
The given cracking reaction is:
To Calculate: The standard enthalpy change for the given “cracking” reaction.
Using the Appendix C, the heat of formation (
The
Hence, the standard enthalpy change is
The standard enthalpy change for the given “cracking” reaction is calculated as
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Chapter 21 Solutions
Student Solutions Manual for Ebbing/Gammon's General Chemistry, 11th
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