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Question

0.5H2(g)+0.5Cl2(g)HCl(g); ΔH0298= 22060 cal

The mean heat capacities over this temperature range are,

H2(g), Cp=6.82 calmol1K1; Cl2(g), Cp=7.7 calmol1K1; HCl(g), Cp=6.81 calmol1K1

The magnitude of the heat of formation of HCl(g)(in cal) at 348 K from the above data will be:

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