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Calculate the standard enthalpy change f...

Calculate the standard enthalpy change for the reaction
`CH_4 (g) + 2O_2(g) to CO_2(g) + 2H_2O(l)`,
given that the standard heatds of formation of `CH_4(g, CO_2(g) and H_2O (l) ` are` -74.91 mol^(-1), -394.12 kJ mol^(-1) and -286.31 kJ mol^(-1)` respectivley.

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Standard enthalpy change for the reaction can be calculated by following formula. `Delta rH^(@)= {Sigma Delta_(f) H_(("products"))^(@) - Delta_(f) H_(("reactants"))^(@)}`
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