How much heat transfer was given out for one kg propane

Question

Problem

1. Agriculturally derived butanol, C₄H₁₀O, with a molecular mass of 74.12, also called biobutanol, has a lower heating value LHV = 33 075 kJ/kg for liquid fuel. Find its formation enthalpy.

2. In a picnic grill, gaseous propane and stoichiometric air are mixed and fed to a burner, both at P₀, T₀. After combustion, the products cool down and exit at 500 K. How much heat transfer was given out for 1 kg propane?

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.