# When a 21.1-g sample of ethyl alcohol (molar mass 46.07 g/mol) is burned, how much energy is released as heat?

${H}_{3} C - C {H}_{2} O H \left(l\right) + 3 {O}_{2} \left(g\right) \rightarrow 2 C {O}_{2} \left(g\right) + 3 {H}_{2} O + \Delta$
You can work out the molar equivalence of ethanol (approx. 0.5*mol); we need data for the enthalpy of combustion of ethanol.......over to you..........