d HEAT OF A COPPER DISPLACEMENT REACTION i Put 25 mL 02 M copper sulphate solution in a 100 mL polythene fitted with a 1hole stopper and thermometer Replace the stopper invert the bottle and shake it gently Record the temperature of this solution Turn the bottle the right way up remove the stopper and add 05 g of zinc dust The quantity of zinc powder is in excess to ensure that all the copper sulphate is used up in the reaction so some zinc will remain when the reaction stops Replace the stopper invert the bottle and shake gently Record the highest temperature reached Calculate the rise of temperature This rise of temperature in not affected by the volume of 02 M copper sulphate used for the experiment For a 1 M solution multiply the rise in temperature by 5 5 X 02M  10 M The reactants lost energy to the solution The temperature change is usually between 9oC and 10oC Zns  Cu2aq  Zn2aq  Cus ii Repeat the experiment with 05 g of iron powder or iron filings This amount is again an excess so that all the copper sulphate will be used up in the reaction The temperature change is usually between 6oC and 7oC