For which one of the following reactions will δh be approximately (or exactly) equal to δe?


For which one of the following reactions will delta H be approximately (or exactly) equal to delta E?

H2(g) + Br2(g) —> 2HBr(g)
H2O(l) —> H2O(g)
CaCO3(s) —> CaO(s) + CO2(g)
2H(g) + O(g) —> H2O(l)
CH4(g) + 2O2(g) —> CO2(g) + 2H2O(l)

Answer

The sign of AS can be predicted for the process involving changes of state For example, AS>0(entropy increases)for the follow

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