[OneWayTicket]

Acetylene (C2H2) and butane (C4H10) are gaseous fuels with enthalpies of combustion of -49.9kJ/g and -49.kJ/g respectively. Show appropriate calculations to compare the energy available from the combustion of a given volume of acetylene to the combustion energy available from the same volume of butane gas at the same temperature and pressure.

I'm not quite sure what the question even wants, or how to go about starting this. Any help would be greatly appreciated.

[123456789]

i think they want you to find the difference in the energy of combustion per mole of each substance. you see, the 2 compounds have different molar mass. however for each mole of the substance, at same temperature and pressure, the volume is the same. therein lies the difference:P

[curiouscat]

Convert per unit gm values to per unit volume values.