Temperature change of beaker of water

Equipment

kettle
stopwatch
thermometer
100 ml pyrex beaker
100 ml measuring cylinder
heatproof mat

Method

1. Fill the kettle and boil the water
2. Pour 50 ml of boiling water into the beaker and stand it on the heatproof mat
3. Start the stopwatch and note the starting temperature of the water
4. After three minutes stop the stopwatch and note the final temperature of the water
5. Leave the hot water in the beaker
6. Repeat steps 3-5 a further four times
7. For each row of data calculate the temperature change

Risk assessment

hazard	risk	probability	mitigation
kettle	electrocution	low	keep lead away from water; mop up any spills; keep hands dry
hot water	burns	low	keep hot water in centre of desk; use protective clothing
glassware	cuts	low	handle glassware with care; quickly tidy up any broken glass

Images

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