Heating And Cooling Lesson 3

Heating and cooling ,[object Object],[object Object],Wednesday 25 November 2009

The investigation ,[object Object]

The experiment ,[object Object],[object Object]

The beakers ,[object Object],[object Object],[object Object],[object Object],The results Now draw a graph of your results Time Lid on No Lid 0 1 2 3 4 5 6 7 8 9

Time (minutes) 0 1 2 3 4 5 6 7 8 9 10 Temperature 0 20 40 80 Lid on No lid 60

Analysing results ,[object Object],[object Object],[object Object],[object Object],1. Beaker with lid on cools slower than the one with no lid. 2. The lid stops heat being lost by convection so the rate of heat loss is slower. Both beaker lose heat by conduction.

The beakers ,[object Object],[object Object],[object Object],[object Object],The results Now draw a graph of your results Time Single Double 0 1 2 3 4 5 6 7 8 9

Time (minutes) 0 1 2 3 4 5 6 7 8 9 10 Temperature 0 20 40 60 80 Double Single

Analysing results ,[object Object],[object Object],[object Object],[object Object],1. The double insulated beaker cools much slower than the single insulated one – this shows that the air trapped between the glass keeps insulates the container. 2. Air is a poor conductor of heat the air between the glass cannot escape so the water in the beaker stays hot.

Heating And Cooling Lesson 3

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Heating And Cooling Lesson 3