Heat of combustion is always a_?
Correct answer: A. Exothermic reaction
- A. Exothermic reaction
- B. Endothermic reaction
- C. Spontaneous reaction
- D. Non-spontaneous reaction
Explanation
An exothermic reaction releases heat energy into its surroundings. During combustion, substances typically release heat, making the heat of combustion an example of an exothermic process.
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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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