10:48 minutes
Problem 55b
Textbook Question

When an 18.6-g sample of solid potassium hydroxide dissolves in 200.0 g of water in a coffee-cup calorimeter (Figure 5.18), the temperature rises from 23.7 to 44.5 °C. (b) Using your result from part (a), calculate H (in kJ>mol KOH) for the solution process. Assume that the specific heat of the solution is the same as that of pure water.

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