The heat of combustion of benzene, C6H6, is 41.74 kJ/g. ...

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Question 1

The heat combustion of acetylene, C₂H₂(g), at 25°C is –1299 kJ/mol. At this temperature, ΔH_f° values for CO₂(g) and H₂O(l) are –393 and –286 kJ/mol, respectively. Calculate ΔH_f° for acetylene.

◦ 2376 kJ/mol
◦ 625 kJ/mol
◦ 227 kJ/mol
◦ –625 kJ/mol
◦ –227 kJ/mol

Question 2

The heat of combustion of benzene, C₆H₆, is –41.74 kJ/g. Combustion of 3.21 g of benzene causes a temperature rise of 3.95°C in a certain bomb calorimeter. What is the heat capacity of this bomb calorimeter?

◦ 529 kJ/°C
◦ 33.9 kJ/°C
◦ 0.304 kJ/°C
◦ 5.65 kJ/°C
◦ 134 kJ/°C

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