In Charles Law experiment, there are directions in the Procedure, which if not f
ID: 773241 • Letter: I
Question
In Charles Law experiment, there are directions in the Procedure, which if not followed, would introduce ERRORS. Consider the Deviations below, AND comment on H-O-W a student's RESULTS would be affected if: 1.) A student allowed all the water in the beaker to boil away, but continued the experiment. 2.) Another student was in a hurry and stopped heating, even though bubbles were still emerging from the rubber tubing. 3.) A student used the measure of Flask no.1 to be 250mL, without measuring the volume as directed. 4.) A student recorded the temperature in degrees Celsius and used these values in the calculations.
Explanation / Answer
1)unless it is being heated by the boiling water, we have no idea what temperature the gas is at.2)It is not Oxygen. It is water vapourand It won't change the composition of pure water.
3)250 flask holds 250 mls at about the point where the sides become vertical.
filled to the brim, it is actually about a 270 ml flask
4)as the temp changes in degrees Kelvin, we expect that the volume of the gas will change by the same percentage.. so if we cooled it 30% we expect that the volume will drop 30%.so that V1/T1 = V2/T2
but if we expected it to drop 30 % of 250 ml, i.e. by 75ml...
we would find that the volume actually droped by about 80 mls , which is 30% of the actuall volumeso that V1/T1 would not equal V2/T2