The combustion of 0.4196 g of hydrocarbon releases 17.55 kJ ofheat. The masses of the products are 1.418 g of carbon dioxide(CO2) and 0.290 g of water (H2O). Thestandard formation enthalpy for CO2(g) andH2O(l) are −393.5 kJ/mol and −285.8 kJ/mol,respectively.
(a) What is the empirical formula of the compound?
(b) If the approximate molar mass of the compound is 76 g/mol,calculate the standard enthalpy of formation.
Δ
H
=
