What is the standard enthalpy of reaction ( Delta H circ rxn) for CH 4(g) + 2O 2(g) -> CO 2(g) + 2H 2O(l), given Delta H f circ [CH 4] = -75 kJ/mol, Delta H f circ [CO 2] = -394 kJ/mol, and Delta H f circ [H 2O(l)] = -286 kJ/mol?

What is the standard enthalpy of reaction ( $Δ H_{r x n}^{\circ}$ ) for $C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (l)$ , given $Δ H_{f}^{\circ} [C H_{4}] = - 75 kJ/mol$ , $Δ H_{f}^{\circ} [C O_{2}] = - 394 kJ/mol$ , and $Δ H_{f}^{\circ} [H_{2} O (l)] = - 286 kJ/mol$ ?

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