Question

Calculate the standard combustion enthalpy for propylene at 25 ºC using the standard formation entropy for liquid water (–286 kJ / mol) and the following reactions.

I. CH2CHCH3 (g) + H2 (g) ® CH3CH2CH3(g); DH⦵ = –125 kJ/mol

II. CH3CH2CH3 (g) + 5 O2 (g) ® 3 CO2(g) + 4 H2O(l); DH⦵ = –2220 kJ/mol

Answer 1