Very Quick Chem Question Watch
suggest two reasons why a seieres of temp. readings is taken rathe than simply inital an dfinal readings
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.