Tuesday
September 2, 2014

Homework Help: Chemistry

Posted by walter on Wednesday, June 18, 2014 at 2:47pm.

From the following data at 25C,
H2(g) + Cl2(g) → 2HCl(g) ΔH0 = −185 kJ
2H2(g) + O2(g) → 2H2O(g) ΔH0 = −483.7 kJ

Calculate ΔH0 at 25C for the reaction below.
4HCl(g) + O2(g) → 2Cl2(g) + 2H2O(g)

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