The Student Room Group

Urgent Help Needed for AS Practical!

My teacher is being terribly unhelpful... extrapolation - what the hell is that? I'm supposed to use it to calculate the temperature rise of my results from my graph.
We're studing the results of the reaction with zinc and copper sulphate, and zinc with lead nitrate. My results for the lead nitrate came out okay, but I messed up the copper sulphate ones. Can anyone tell we what they're supposed to be like in contrast to the lead nitrate ones? Do the temperatures go up quicker?
extrapolation is basically recording the temperature at specific intervals and plotting them on a graph

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