Question

Enthalpies of formation of CO2,H2O,CH4 are -393.5kjmol, -285.8kjmol,-75kjmol respectively calculate the enthalpy of combustion of methane at 298K

Answer 1

Answer:

-890.1kj/mol

Explanation:

CH4+2O2-----CO2+2H20

-75. -393.5+-285.8*2

-75. -965.1

-965.1-(-75)=-890.1kj/mol