∆Hf of a compound is equal in magnitude to the:
Correct answer: D. Heat of reaction
- A. Heat of combustion
- B. Heat of decomposition
- C. Heat of solution
- D. Heat of reaction
Explanation
The correct option is D) Heat of reaction. The ∆Hf (enthalpy of formation) of a compound is equal in magnitude to the heat of reaction. Enthalpy of formation refers to the heat change when one mole of a compound is formed from its constituent elements in their standard states.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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