Liquid methanol (CH

3
OH) is used as an alternative fuel in truck engines. When a 0.150 g sample
of methanol was burned in a calorimeter, open to
the atmosphere, the temperature increased 1.52 ºC.
The heat capacity of the calorimeter was 1.97 kJ
/ ºC. The products of the reaction were carbon
dioxide,
'
Hº
f
(CO
2
) = -393.5 kJ/mol and water vapour,
'
Hº
f
(H
2
O(g)) = -241.8 kJ/mol.
Calculate the enthalpy of formation,
'
Hº
f
, for CH
3
OH(l).