If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will___________________?
Correct answer: C. Remain unaltered
- A. Increase
- B. Decrease
- C. Remain unaltered
- D. Increase or decrease; depends on the particular reaction
Explanation
Kirchhoff's relation is d(ΔH)/dT = ΔCp. If the total heat capacities of products and reactants are identical, ΔCp is zero and the heat of reaction remains unchanged with temperature.
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