A129 to determine the average energy of the P-N molecule PH

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129. Determine the average energy of the P-N molecule RH3 if 1/2 P2 (g) + 3/2 H2 (z) = PH3 (g) 17.17 kJ and dissociation energy of P2 and N2 are respectively 489, 1 kJ / mol and 435.9 kJ / mole.

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The objectives of the manuals "Chemistry. Guidelines, work program and control tasks, "ed. prof. VA Averyanov, Part 1, Tula, 2004.
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