• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigation on Boyles law

Extracts from this document...

Introduction

Investigation on Boyles law Apparatus Hypothesis My hypothesis of this experiment is that if a fixed (set) mass of air is made smaller then the molecules will be closer together, this will cause the molecules to bounce around more causing more pressure. I calculate that if you half the volume of the liquid then the pressure inside the air column will double. This will be caused by the number of molecules per cm3 inside the glass column being doubled. Therefore the results should be inversely proportional. The equation for inverse proportion is: V ? 1/p - This equation will form a reciprocal graph, which should look something like the above diagram. Method For this experiment we have to keep certain constants maintained during this experiment or it could make the test unfair and alter the results. We have to keep temperature the same for this test to work. We used a foot pump and pumped the air into the column, which increased the pressure. ...read more.

Middle

Therefore this proves Boyles law, which is that when you half the volume the pressure doubles. My results do agree with my hypothesis as I stated that my graph would produce a nice curve, which is clearly shown on my graph I have produced. I stated that the results would be inversely proportional and from the equation V ? 1/P we can see the results match. If we take an example: 7 ? K x 1/70, if we work out K we get it as 490. So now if we do the sum 1/70 times 490 we get the answer 7. This proves that the equation V ? 1/P is correct which means the results are inversely proportional. However to plot the graph correctly you need to change you results slightly. If you just plot Pressure over Volume then you will get a curve but to plot the inversely proportional points we have to make all of our pressure points a fraction so we would plot volume over 1/pressure. ...read more.

Conclusion

This meant there was a lot of room for error. Another way of boosting the efficiency is to take the readings more than once, the more times the better. Even with two readings there is still error so more tests eliminates stray readings. The readings that are stray do not really match the equation earlier then we can only deduct that they are results of human error and therefore are needed to be left out and ignored. To make this experiment even more reliable we could see if Boyles Law still remains or becomes less precise under very high pressure. We could see if the results remain inversely proportional but to get them inversely proportional for any pressure we would have to use "the perfect gas". Results Pressure (lb/in2) To Check Volume (cm3) 70 7 62 8 50 8.75 45 45 10 42 10.75 39 11.5 36 12.5 34 13 32.5 32.5 14 31 14.5 30 15 29 15.5 28 16.5 26.5 17 25.5 25.5 18 24.5 19 23.5 20 22.5 21 21.5 21.5 22 20.5 22.5 20 23.5 19.5 24.5 19 25 18.5 18.5 26 18 27 17 28 16.75 29 16.5 29.5 15 32 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Core & Pure Mathematics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Core & Pure Mathematics essays

  1. 2D and 3D Sequences Project Plan of Investigation

    it to Find the Number of Squares in Higher Sequences I will now prove my equation by applying it to a number of sequences and higher sequences I have not yet explored. Sequence 3: 1. 2(32) - 6 + 1 2. 2(9) - 6 + 1 3. 18 -5 4.

  2. Numerical Method (Maths Investigation)

    It is logical to use one of the equations above that are most suitable for applying the other two methods to find the required root. Most Suitable equation is the equation that doesn't meet to the criteria of the failure of all these three methods.

  1. Sequences and series investigation

    128 - 15 5. = 113 Successful The formula I found seems to be successful as I have shown on the previous page. I will now use the formula to find the number of squares in a higher sequence. So now I wil use the formula 2n2 - 2n + 1 to try and find the number of squares contained in sequence 20.

  2. Mathematical Investigation

    Thus the period of the function y=sin (2x) is 1/2 of the original function y=sin(x). Varying values of "b" changes the frequency of the function changes as well. Frequency is the # of waves that fit in a fixed period.

  1. The Gradient Fraction

    But as you can see the results do make some sense. In this graph I begin to see a pattern in the gradients. I have investigated the following points in the 'x' scale; 3, 4 and -2. From looking at the graph results, its seems like the 'x' values are being doubled (multiplying by 2).

  2. Although everyone who gambles at all probably tries to make a quick mental marginal ...

    Case 2 The game of chance that is mentioned in the St. Petersberg Paradox involves a fair coin. It is repeatedly tossed until, on the nth toss, the coin lands heads up. The payoff is $. Entry to the game shall be set at $5 for the purposes of this essay.

  1. Triminoes Investigation

    So these results would help met to find out the relationship. The Formula for the n th term f (n) =an� + bn� +c Quadratic (3 unknown) f (n) =an� + bn� + cn� + d Cubic (4 unknown) f (n)

  2. Three ways of reading The Bloody Chamber.

    The third way that I propose to offer will be simply an extension of the levels of semiological analysis to include a third level, which stands in relation to the second level, much as the second level stands to the first.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work