Experiment 6 - Experiment 5: Calorimetry and Hesss Law...

Experiment 5 : Calorimetry and Hess’s Law
Class : Chemistry 1250
Name : Zehan Irani
Due Date : Thursday 13
th
, February
TA’s name : Si-Han Chen

Purpose
Calibrate and use a calorimeter to determine enthalpy change for two different reactions.
Relate temperature measurements and heat transferred by using heat capacities or specific
heat. Use thermochemical equations to relate the change in enthalpy to the amount of
substances involved in the reaction. Use Hess’s Law to determine the enthalpy change for
a chemical reaction.
Procedure
Please refer to Chemistry 1250 General Chemistry Laboratory Manual , 2013,
Department of Chemistry, The Ohio State University, Hayden McNeil, Exp 6, pages 45-
58, for the proper procedure.

Graphs
Result and Discussion
In this experiment we had to use two copper cylinders which we heated first in boiling
hot water, whichrose the tempereature of the copper cylinders to 99.4 o C . we then
transferred the cylinders into a coffe cup calorimeter and recorded the change in