Which substance, methane or octane produces more heat per gram of fuel?

Question

Which substance, methane or octane produces more heat per gram of fuel?

Answer 1

while suitable combusted, propane produces approximately 2,500 BTU consistent with cubic foot of gasoline. additionally, methane's warmth of combustion is approximately 902 kJ/mol, that's below the different hydrocarbon You do the convesion math although curiously that Propane produced greater warmth

Answer 2

convert KJ/mole to KJ/gram by dividing with molecular weight.We get methane to have high heat per gram.

Answer 3

Octane.



Every carbon atom will produce heat as it is oxidized to CO2. Octane contains 8 atoms per molecule and methane has only 1. Also, methane is a gas and is far less dense than octane, which is liquid. There is more octane than methane if the volume of each is the same. These facts are seen in the enthalpy. It is a measure of initial minus final conditions. The values are negative because the final conditions were greater than the initial conditions. Octane has a far larger negative number, so it produced the most heat per unit volume.

Answer 4

methane is CH4.. 16 g/mole

octane is C8H18... 114 g/mole



methane... (1780.72 kJ/mole) x (1 mole / 16g) = 111 kJ/g

octane... (10859 kJ/mole) x (1 mole / 114g) = 95 kJ/g



methane is the correct answer



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