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A thermochemical equation is a chemical equation showing the enthalpy change as well as the molar relationship. A correct chemical equation is always balanced and the enthalpy change is always specified on a per-mole basis. The thermochemical equation for the combustion of white phosphorus (P4) is P4(s) + 5 O2(g) ? P4O10(s) ?H = - 3013.kJ.mol-1 Calculate the heat released when 1 kg of white phosphorus is allowed to burn in air at a constant pressure of 1 bar.

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