Which equation is a correctly written thermochemical equation?

Question

Question 8 options:

NH4Cl --> NH4+ + Cl-

2C8H18 + 25O2 --> 16CO2 + 18H2O,
ΔH= −5,471 kJ/mol

Fe (s) + O2 (g) --> Fe2O3 (s), ΔH= −3,926 kJ

C3H8 (g) + 5O2 (g) --> 3CO2 (g) + 4H2O (l), ΔH= −2,220 kJ/mol

Answer 1

The correct answer is: 2C8H18 + 25O2 --> 16CO2 + 18H2O, ΔH= −5,471 kJ/mol