In the reactionC(s) + O2(g) ⟶ CO2(g)∆H° = -394kJ: ∆H° represents
Correct answer: B. Standard heat of combustion of CO2
- A. Standard heat of formation of CO
- B. Standard heat of combustion of CO2
- C. Standard heat of combustion of CO
- D. Standard heat of combustion of C
Explanation
It is the standard enthalpy of combustion as 1 mole of carbon is burned under excess oxygen to form CO2.
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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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