I have given the procedures of our experiment above I cant f

Solution

#3. Solution:- The energy diagrams are already there along with the question. If we compare these two diagrams then in the first one the reactant energy level is higher than product energy but in second diagram the reacatant energy level is lower than the product energy.   

If the product energy level is lower than reactant energy then heat is released and this released heat increases the temperature of the system. on the other hands, if the product energy level is higher than reactant energy then heat is consumed and so the temperature of the system decreases.

For temperature measurement we use the thermometer fitted in the calorimeter and we could read the temperature in it. Temperature change is the different of final and initial temperatures.

temperature change = Tf = Ti

where Tf is final temperature and Ti is initial temperature.