The stockroom of the virtual laboratory contains a cabinet called “Thermochemistry Solutions.” Different concentrations of Reagent A and Reagent B have been placed into this cabinet. You will use these solutions to answer the questions below. 1) (3 pts) Use the lab to measure Delta Ho for the reaction that occurs when reagents A and B are combined: A + B ==> C Please note that each prepared flask contains 100 mL of solution. Also, you may assume the heat capacity of the aqueous solutions is equal to the heat capacity of water 4.18 J/g Ko Please describe your complete procedure and the key quantities you measure. Points are based upon your final answer and whether or not you explain your procedure in sufficient detail for us to reproduce your actions. You are not graded on the method you used: all approaches that meet the above goal are equally valid. 2) (3pts) Using water and the reagents provided in the lab, create two solutions such that when you mix equal amounts together, the resulting solution has an initial temperature of 50o C. Please describe your complete procedure and the key quantities you measured. Points are based upon your final answer and whether or not you explain your procedure in sufficient detail for us to reproduce your actions. You are not graded on the method you used: all approaches that meet the above goal are equally valid. http://chemcollective.org/vlab/90

Unit 5 Virtual Lab: Determining the Heat of Reaction in Aqueous Solution