To calculate:
a)
b) Whether conversion of diamond into graphite is exothermic or endothermic.
Answer to Problem 9.72QA
Solution:
a)
b) Conversion of diamond into graphite is exothermic.
Explanation of Solution
1) Concept:
To calculate the value of
2) Given:
i)
ii)
iii)
iv)
3) Calculations:
Conversion reaction of diamond to graphite is shown as
Given equations are
Equation 1
Equation 2
Equation 3
Now combine equation 1, 2, and 3 to get the overall equation. We have to reverse the equation 2 in order to cancel
Adding the equations 1, 2, and 3, we get
So
Conclusion:
We have calculated the enthalpy change of the conversion of diamond to graphite. The value of heat of reaction is negative, so the reaction is exothermic.
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