Lab 13 Heat of Solution

Lab 13 Heat of Solution - Date Performed Date Submitted...

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Date Performed: 02/04/08 Name: Dustin Rinehart Date Submitted: 02/11/08 Partner: Sarah Volski Instructor: Furong Sun Heat of Solution Objective To determine and interpret the heats of solution in water of lithium chloride, potassium chloride, and calcium chloride To illustrate an application of Hess’ law 100g of deionized water 52.6g styrofoam cup Experimental Data Salt mass (g) Potassium Chloride 2.07 Calcium Chloride 3.09 Lithium Chloride 1.18 Sample Calculations Find the heat of solution for each salt Q=(mass)(C)( Δ T) Q=(2.07g)(4.1e^-3 kJ/g*C)(21.03C-22.22C)= -.0101kJ (-.0101 kJ) 74.55g (-.3637 kJ/mol) 2.07g mole
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Find the heats of hydration 2H solution =2H lattice -2H hydration -.3636kJ/mol= 715kJ/mol - 2H hydration 2H hydration = -715.3637
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Results Ca did not fall upon the line because it did not have the same trend that the other salts had. This was the largest solution in size and in the number of molecules. The larger the molecule, the less energy it is able to give out due to area size of concentration. heat
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Lab 13 Heat of Solution - Date Performed Date Submitted...

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