Question: What is the enthalpy change of a reaction at 90oC, if the enthalpy of reactant at 90oC and 25oC are 60 J and 25 J, and enthalpy of product at 90oC and 25oC are 80 J and 10 J, and the enthalpy change of reaction at 25oC is 5 J?

Options

A : 10 J

B : 50 J

C : 110 J

D : 150 J

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