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What is the enthalpy change of solution if the enthalpy change of solute is 10 J, and enthalpy of solvent is 15 J?

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What is the enthalpy change of solution if the enthalpy change of solute is 10 J, and enthalpy of solvent is 15 J?

(a) 10 J

(b) 15 J

(c) 25 J

(d) 40 J

This question was posed to me in an online quiz.

Query is from Heat of Solution, Dissolution and Mixing topic in chapter Energy Balances that Include the Effects of Chemical Reaction, Ideal Processes, Efficiency and the Mechanical Energy Balance and Heats of Solution and Mixing of Basic Chemical Engineering

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The correct option is (c) 25 J

The best explanation: ∆Hsolution = ∆Hsolute +∆Hsolvent = 10 + 15 = 25 J.

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