Question

B) How many kilojoules of heat will be released by the combustion of 22.52 g of this liquid at

constant pressure?
C2H5OH burning in a simple alcohol lamp is -1277.3kJ/mol​

Answer 1

Step-by-step explanation:

You realize that C2H5OH releases -1277.3kJ/mol. We need to convert this to the amount based on the question. We that 22.52g of C2H5OH = 0.48884 mol.

This means that it will release (-1277.3)(0.48884) = 624.40 KJ of heat will be released. Note the negative sign is not necessary here (I think) because it says how much is released and not the change in heat of the system so it should be positive.