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October 20, 2014

Homework Help: Physical Chemistry

Posted by Trixie on Wednesday, February 10, 2010 at 3:02am.

Determine the temperature change when 18.0 g of the following salt is dissolved in 190. g of water. The specific heat capacity of water is 4.184 JK-1g-1. The enthalpies of solution in the table are applicable. Do not take the added mass of the salt into account when calculating q for the solution.

dH for KCl: +17.2 kJ/mol
dH for MgBr2: -185.6

Have tried using q= mCdT, but keep getting something wrong... Thanks in advance

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