Chemistry homework question? Need help

Posted on 2015-01-21 06:58:00 in Chemistry by SAMMY

A student conducts an experiment to determine the enthalpy of solution for lithium chloride dissolved in water. The student combines 5.00g of lithium chloride with 100mL of distilled water. The initial temperature of the water is 23 degrees Celsius and the highest temperature after mixing reaches 33 degrees Celsius. Assume a density of 1 g/mL and a specific heat of 4.18 J/(gxC). The calorimeter constant was found to be 20 J/C.

a) Is the reaction endothermic or exothermic? Why?
b) Calculate the temperature change of the solution in the calorimeter.
c) Calculate the total mass of the solution in the calorimeter.
d) Calculate the energy change of the solution.
e) Calculate the energy change of the calorimeter.
f) Calculate the total change of enthalpy of the solution in kJ/mole.

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