The enthalpy of reaction for the reaction : 2H2(g) + O2(g) → 2H2O(l) is ∆rHᶱ = – 572 kJ/ mol. What will be standard enthalpy of formation of H2O (l ) ?
The enthalpy of reaction for the reaction : 2H2(g) + O2(g) → 2H2O(l) is ∆rHᶱ = – 572 kJ/ mol. What will be standard enthalpy of formation of H2O (l ) ?
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1 Answer
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Chemistry NCERT Exemplar Solutions Class 11th Chapter six
Standard molar enthalpy of formation is the enthalpy change for the formation of one mole of a compound from its most stable states or reference states. As per the given information in the question, the standard enthalpy for the given equation is – 572 kJ mol–1Now the enthalpy of formation for H2O will be half the enthalpy of the value in the given equation. So now we can calculate that
? fH? = = -286KJ/mol
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