October 13, 2015

Homework Help: Chemistry - enthalpy of combustion(help!!!)

Posted by Farah on Wednesday, June 8, 2011 at 10:12am.

i need help with the below question, i have tried answering it, but do not know where to go after the equations, please start me off on how to find the enthalpy of combustion of at least one....

Consider methane, CH4, and hydrogen, H2, as possible fuel sources.
(a) Write the chemical equation for the complete combustion of each fuel. Then find the enthalpy of combustion, ΔHcomb, of each fuel. Express your answers in kJ/mol and kJ/g. Assume that water vapour, rather than liquid water, is formed in both reactions.

CH4 + 2O2 ↔ 2H2O + CO2
2H2 + O2 ↔ 2H2O

should i use the enthalpy of formations and its equations??

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