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April 20, 2014

Homework Help: chemistry

Posted by john on Tuesday, November 1, 2011 at 4:34pm.

When 1.50 g of calcium chloride is dissolved in 150.0 g of water, the temperature of the water rises from 20.50C to 22.25C. Assume that all the heat is absorbed by the solution.
(a) Calculate the heat of solution per gram and per mole of CaCl2 that dissolves.
(b) Is this an exothermic or an endothermic process?
(c) Determine the mass of calcium chloride required to prepare the hot compress with the following characteristics:
(i) maximum temperature of 15.0C above average body temperature
(ii) contains 100.0 g of water

Can you please explain too, thank you

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