Chapter 9, Problem 82E

The standard enthalpy of combustion of ethene gas ${\text{[C}}_{\text{2}}{\text{H}}_{\text{4}}\text{(g)]}$ is $-\text{1411}\text{.1 kJ/mol}$ at $\text{298 K}\text{.}$ Given the following enthalpies of formation, calculate ${\text{ΔH°}}_{\text{f}}$ for ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}\text{(g)}$ .

${\text{CO}}_{\text{2}}\left(\text{g}\right)-\text{393}\text{.5 kJ/mol}$

${\text{H}}_{\text{2}}\text{O}\left(\text{l}\right)-\text{285}\text{.8 kJ/mol}$