How does temperature affect the viscosity of oils Essay Example

How does temperature affect the viscosity of oils Essay Example How does temperature affect the viscosity of oils Essay How does temperature affect the viscosity of oils Essay PredictionI predict that as the temperature of the oil increases the viscosity will increase. This means that the ball bearing will drop down quicker as the oil is heated. I think this because when the oil is heated the molecules will vibrate because they are given energy by the heat. This causes the molecules to move apart leaving gaps in between which the ball bearing will be able to move through easily.MethodTake a glass tube and hold it in a clamp stand. Mark up to where you want to put the oil. Fill up to the mark with C6 oil at room temperature. Then drop a ball bearing from the rim of the glass tube. Make sure you start the watch at the exact same time as you drop the ball bearing. Stop the watch as soon as the ball bearing touches the bottom of the tube and put the time of this in the results table. Do this three times and take the average.Repeat these steps for C8, C10, C12 and C16 oils at room temperature. Put the jars of oil into a beaker of water and use a Bunsen burner t o heat it. Try and prevent the water going over the top of the jars of oil, as the water may go into the oils and this would affect the results. When the oil is heated to the required temperature repeat what you did for the oils at room temperature. The oils should be heated to 30à ¯Ã‚ ¿Ã‚ ½C then 40à ¯Ã‚ ¿Ã‚ ½C, then 50à ¯Ã‚ ¿Ã‚ ½C, then 60à ¯Ã‚ ¿Ã‚ ½C, and finally 70à ¯Ã‚ ¿Ã‚ ½C.ApparatusClamp, Clamp stand, Glass tube, Ball bearing, Bunsen burner, Tripod, Gauze, Water, 250ml beaker, Stopwatch, Thermometer, C6, C8, C10, C12, and C16 oils.DiagramPreliminary DiagramPreliminary WorkMy preliminary work helped me significantly to write my plan. Through trying to carry out some practice tests, I found that it was hard and not particularly accurate if I just picked up the ball bearing and dropped it from a little bit above the tube because then my results will be inaccurate. This is why I decided to drop the ball bearing from the rim of the glass tube. This meant it would always be t he same force being put on the ball bearing. My preliminary work has also helped me to determine what the angle the tube should be at. The reason I chose to have the tube at 35à ¯Ã‚ ¿Ã‚ ½ to the tabletop was that at 90à ¯Ã‚ ¿Ã‚ ½ the ball bearing fell much too fast making it difficult to measure the time. However at 0à ¯Ã‚ ¿Ã‚ ½ to the table the ball bearing didnt move at all, thats why I chose a position between the two. This meant it would move down fairly quickly but not too fast as that we couldnt time it.Here are some of our resultsTube angled at Tube angled at Tube angled at90à ¯Ã‚ ¿Ã‚ ½ 0à ¯Ã‚ ¿Ã‚ ½ 35à ¯Ã‚ ¿Ã‚ ½1st time recorded 0.35 secs N/A* 1.96 secs2nd time recorded 0.39 secs N/A* 1.92 secsVariable FactorsOne of many variable factors would be the gradient of the tube. This must be kept at the same angle 35à ¯Ã‚ ¿Ã‚ ½. An easy way to do this is to leave the clamp alone and only open and close the claw part of the clamp. Another factor is the temperature of the oil s. To do this you must measure the oils temperature and make sure that you measure the oil, not just the water they are being heated in. The height of which the ball bearing is dropped should be kept the same so that it doesnt gather more momentum before it hits the oil. That is why it must be dropped from the same height; I chose the rim because then I know it will always be the same. The ball bearing you use must be the same because then the resistance of the ball bearing will be the same.Accurate ResultsTo ensure that I get accurate results I will try and keep the entire variable factors the same all the way through the experiment. If I do this then it will not only make sure that my results will be accurate but it will make sure that the only thing I will be experimenting is the viscosity of the oils and how temperature affects it. I will not be testing anything else.Range of ResultsI want to take 5 times from each of the oils at each temperature. If I do this then I will be abl e to take an average score. This is a good thing because it means that if I mess up one of the drops then it wont matter as much because I will take an average of the 5 times.I will set out my table like this:E.g. Oil C6OilRoom temperature35à ¯Ã‚ ¿Ã‚ ½50à ¯Ã‚ ¿Ã‚ ½C65à ¯Ã‚ ¿Ã‚ ½C80à ¯Ã‚ ¿Ã‚ ½CC61st Time2nd Time3rd Time4th TimeAverageResultsOilRoom temperature35à ¯Ã‚ ¿Ã‚ ½50à ¯Ã‚ ¿Ã‚ ½C65à ¯Ã‚ ¿Ã‚ ½C80à ¯Ã‚ ¿Ã‚ ½CC61st Time1.151.181.030.720.752nd Time1.151.060.930.810.833rd Time1.251.081.091.010.94th Time1.181.190.960.970.815th Time1.251.140.870.970.82Average1.1961.130.9760.8960.822C81st Time1.591.391.10.990.82nd Time1.711.311.211.080.933rd Time1.611.491.11.10.944th Time1.811.511.121.230.985th Time1.541.561.151.090.89Average1.6521.4521.1361.0980.908C101st Time2.141.861.441.611.042nd Time2.171.881.551.140.973rd Time2.131.841.51.161.014th Time1.192.011.491.121.015th Time2.321.991.541.150.98Average1.991.9161.5041.2361.002C121st Time2.71.921.571.1612nd Time2.672.181.661.251.053rd Time2.672.011.631.150.974th Time2.811.961.641.151.025th Time2.691.951.621.291.1Average2.7082.0041.6241.21.028C161st Time4.813.362.772.491.812nd Time4.713.362.792.221.563rd Time4.923.562.682.431.644th Time4.753.523.142.311.575th Time4.93.613.082.421.74Average4.8183.4822.8922.3741.664AnalysisFrom my table and graph I can see that