Sunday, 13 May 2012

Exothermic reaction of Calcium Oxide 2

Equipment

calcium oxide powder
water
spatula
thermometer
stirring rod
5 polystyrene cups
stopwatch

Method

Half fill each of the cups with water so that they are all full to the same level
Record the temperature of the water
Add 1 spatula of CaO to the first cup, 2 spatulas into the second one etc and stir to make sure it all dissolves
Wait 1 minute and measure the temperature in all the cups again
Rinse all the cups out and repeat the experiment another two times
Calculate the average temperature rise for each cup

Safety

CaO is an irritant and contact with skin should be avoided.