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footballhead
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#1
Report Thread starter 14 years ago
#1
A graph showing temperature changes for an experiment later used to find an enthalpy for the reaction

suggest two reasons why a seieres of temp. readings is taken rathe than simply inital an dfinal readings
thanks!!
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oxymoron
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Allows you to extrapolate the curve to find the temperature it would have reached if the solution was not cooling down and losing heat to the surroundings.

You do this by drawing two straight lines: one being the point where the temperature increases fastest and the other being the line at the end where the solution is cooling ... if this is not clear, let me know and I'll draw a diagram.

Another reason is that it enables you to show the initial temperature is constant by showing the flat bit of the graph at the start.
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