Answer to Question #86685 in General Chemistry for taha

General Chemistry

Question #86685

When 16.08 g KOH is dissolved in 151.7 g of water in a coffee-cup calorimeter, the temperature rises from 11.54 °C to 26.19 °C. What is the enthalpy change per gram of KOH dissolved in the water? Assume that the solution has a specific heat capacity of 4.18 J/g×K.

A. -183 J/g
B. -639 J/g
C. 639 J/g
D. -1.03×104 J/g
E. -578 J/g

Expert's answer

B. -639 J/g

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