I have a Chemistry problem! please help!?

Question

Consider the dissolution of CaCl2:

CaCl2 -> Ca+2 + 2Cl- Delta H= -81.5 kj

An 11.0 g sample of CaCl2 is dissolved in 125g of water, with both substances at 25.0 degress celcius. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat of 4.18 J/g * C.

Answer 1

First you have to find the moles of CaCl2 involved, since the heat of dissolution is per mole. Once you do that, you can find the kj generated. Then you can divide that by 125 x 4.18 to find the temperature rise.