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November 26, 2014

Homework Help: chemistry plse help

Posted by yr on Wednesday, April 27, 2011 at 8:05pm.

Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction:

P4(g) + 10 Cl2(g) → 4PCl5(s), ΔH°rxn = ?

Given:

PCl5(s) → PCl3(g) + Cl2(g), ΔH°rxn= +157 kJ

P4(g) + 6 Cl2(g) → 4 PCl3(g), ΔH°rxn = -1207 kJ

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