# Problem: Methanol (CH3OH) burns in oxygen to form carbon dioxide and water. Write a balanced equation for the combustion of liquid methanol and calculate ΔH, ΔS, and ΔG at 25 °C. Is the combustion of methanol spontaneous?

###### FREE Expert Solution

Balanced reaction: CH3OH(l) + 3/2 O2(g) → CO2(g) + 2 H2O(g)

Step 1: We can use the following equation to solve for ΔH˚rxn:

Note that we need to multiply each ΔH˚f by the stoichiometric coefficient since ΔH˚f is in kJ/mol.

Also, note that ΔH˚f for elements in their standard state is 0.

ΔH°rxn = –637.9 kJ/mol

Step 2: We can use the following equation to solve for ΔS˚rxn:

Note that we need to multiply each S˚ by the stoichiometric coefficient since S˚ is in J/mol • K.

###### Problem Details

Methanol (CH3OH) burns in oxygen to form carbon dioxide and water. Write a balanced equation for the combustion of liquid methanol and calculate ΔH, ΔS, and ΔG at 25 °C. Is the combustion of methanol spontaneous?