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What is the value of ∆H for the reaction   H2(g)   +    ½ O2(g)→ H2O(l) at 100ºC...

What is the value of ∆H for the reaction   H2(g)   +    ½ O2(g)→ H2O(l) at 100ºC and 1 atm? The experimental values of the average molar heat capacity at constant pressure, Cp, over the range 25ºC to 100ºC are 28.9, 29.4, and 75.5 J/K -mole, for H2(g), O2(g) and H2O(l), respectively.

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