Concept explainers
Interpretation:
From the given information the standard enthalpy of formation of methane has to be calculated.
Concept Introduction:
Change in enthalpy in a reaction and enthalpy of formation are related by the formula,
Where,
Hess’s law is applied to calculate the enthalpy changes in a reaction. According to Hess’s law – “The overall enthalpy change of a reaction is equal to the sum of the enthalpy changes involving in each and every individual steps in the reaction.” Thus if a reaction involves ‘n’ steps then enthalpy change
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