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What is the final enthalpy of the solution made by mixing 10 grams of solution A having enthalpy 10 J with 40 grams of solution B having enthalpy 30 J?

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What is the final enthalpy of the solution made by mixing 10 grams of solution A having enthalpy 10 J with 40 grams of solution B having enthalpy 30 J?

(a) 14 J

(b) 18 J

(c) 22 J

(d) 26 J

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Asked question is from Effects of Mixing into Energy Balance 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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Correct option is (d) 26 J

Easiest explanation: Final enthalpy = 0.2*10 + 0.8*30 = 26 J.

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