Formation Reactions

Question

 

The combustion of heptane, C7H16, occurs via the reactionC7H16(g)+11O2(g)→7CO2(g)+8H2O(g)

with heat of formation values given by the following table:

Substance
ΔH°f
(kJ/mol )
C7H16 (g): -187.9
CO2(g): − 393.5
H2O(g): − 241.8
 

Calculate the enthalpy for the combustion of 1 mole of heptane.
Express your answer to four significant figures and include the appropriate units.

Answer 1