Ethyn (C2H2) burns in oxygen according to the equation below. How much energy is released when 10.5 moles of acetylene burn?

C₂H_{2 (g)} + 3/20₂ (g) --> 2CO₂ (g) + H₂O (l)

The following is given:

H f (CO2 (g)) = -393,5 kJ/mole

H f (H2O (l)) = -241,8 kJ/mole

H f (C2H2 (g) = 226,6 kJ/mole