Acetic acid, HC2H3O2, is the sour constituent of vinegar (acetum is Latin for "vinegar" ). In an experiment, 3.76 g of acetic acid was burned.

Question

HC2H3O2(l) + 2 O2(g) 2 CO2(g) + 2 H2O(l)

If 54.6 kJ of heat evolved, what is ÄH per mole of acetic acid?

Answer 1

1. Convert 3.76 g HC2H3O2 to moles.
2. Divide 54.6 kJ by the number of moles. Attach a negative sign to the answer. The answer is in kJ/mole