16:07 minutes
Problem 95c
Textbook Question

The standard enthalpies of formation of gaseous propyne 1C3H42, propylene 1C3H62, and propane 1C3H82 are +185.4, +20.4, and -103.8 kJ>mol, respectively. (b) Calculate the heat evolved on combustion of 1 kg of each substance.

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