Question

Cooking gas cylinders contain 92% butane (C4H10). Consider the following reaction.
C4H10(g) + O2(g)  4CO2 + 5H2O( ) cH0 = –2655.0 kJ/mol

The energy released during this process is known as

Answer 1

That's the (standard) enthalpy of combustion (also called the heat of combustion) — ΔcH° = −2655.0 kJ·mol⁻¹, indicating an exothermic release of 2655.0 kJ per mole of C4H10 burned.