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The enthalpy of combustion of propane, graphite and dihydrogen at 298 K298 \mathrm{~K}298 K are −2220.0 kJ mol−1,−393.5 kJ mol−1-2220.0 \mathrm{~kJ} \mathrm{~mol}^{-1},-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}−2220.0 kJ mol−1,−393.5 kJ mol−1 and −285.8 kJ mol−1-285.8 \mathrm{~kJ} \mathrm{~mol}^{-1}−285.8 kJ mol−1 respectively. The magnitude of enthalpy of formation of propane (C3H8)\left(\mathrm{C}_{3} \mathrm{H}_{8}\right)(C3H8) is _______________ kJ mol−1\mathrm{kJ} \,\mathrm{mol}^{-1}kJmol−1. (Nearest integer)
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