Can anybody help me? Please?

0 ⤊

Can anybody help me? Please?

The heat of combustion for heptane is 4817 kJ/mol. How much heat would be released if 250kg of heptane undergoes complete combustion?

2007-04-25 02:14:32 · 2 answers · asked by taylor18brown 1 in Science & Mathematics ➔ Chemistry

2 answers

heptane, C7H16 has a molar mass of 100.204g/mol, and therefore 250, 000g will have 250,000/100.204= 2494.91moles.

The amount of heat released is given by heat of combustion per mole*number of moles= 4817*2494.91= 12017983.31kJ. This will be 12017.983 MJ or 12.017GJ. That is a lot of energy.

2007-04-25 02:26:23 · answer #1 · answered by The exclamation mark 6 · 0⤊ 1⤋

MW heptane (C7H16) = 100 g/mol

250 kg = 250,000 g = 2500 moles

4817 kJ/mol * 2500 moles = 12042500 kJ = 12.04 GJ (gigajoules)

2007-04-25 09:21:54 · answer #2 · answered by TheOnlyBeldin 7 · 0⤊ 1⤋