For the combustion of methane: CH 4(g) + 2 O 2(g) -> CO 2(g) + 2 H 2 O (l), given standard enthalpies of formation Delta H f circ[ CH 4] = -75 kJ/mol, Delta H f circ[ CO 2] = -394 kJ/mol, and Delta H f circ[ H 2 O (l)] = -286 kJ/mol, calculate the standard enthalpy of combustion.

Enthalpy of combustion is -891 kJ/mol

For the combustion of methane: $CH_{4} (g) + 2 O_{2} (g) \to CO_{2} (g) + 2 H_{2} O (l)$ , given standard enthalpies of formation $Δ H_{f}^{\circ} [CH_{4}] = - 75 kJ/mol$ , $Δ H_{f}^{\circ} [CO_{2}] = - 394 kJ/mol$ , and $Δ H_{f}^{\circ} [H_{2} O (l)] = - 286 kJ/mol$ , calculate the standard enthalpy of combustion.

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