Given the following information, calculate AHxn for the reaction.
2C3H8(g) +1002(g) → 6CO2(g) + 8H2O(1)
[4]
AH (C3H8(g)) = -103.9 kJ/mol; AH (CO2(g)) = -393.5 kJ/mol AH (H2O()) = -285.5 kJ/mol