In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is_______________?
Correct answer: C. Same
- A. More
- B. Less
- C. Same
- D. Unpredictable; depends on the particular reaction
Explanation
The relation qP − qV = Δn_gRT applies when gaseous moles change, but solids and liquids have negligible volume changes. Thus the constant-pressure and constant-volume heats of reaction are effectively equal here.
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