Anonymous
Anonymous asked in Science & MathematicsChemistry · 4 months ago

Chemistry Lab?

I need help with the calculations please

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  • 4 months ago
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    Help with calculations ....

    You just need help graphing your data with Excel. Clearly, the question refers to using the spreadsheet software to do find the best fit to your data.

    There don't seem to be any questions referring to the V s P data. At constant temperature, that is Boyle's law where the pressure and volume are inversely proportional: PV = k. The product of the pressure and volume should be the same for each trial. They all are "ten-point-something" (10.2 to 10.6) where the uncertainty is in the first decimal place. The uncertainty in the syringe is probably +/- 0.5 mL.

    As for finding absolute zero.... the graph is below.

    P = 0.003T + 0.803

    T = -0.803 / 0.003 ....... when P = 0

    T = -268 C

    Percent error = |(-273 - (-268)) / -273| x 100 = 1.83%

    .

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  • 4 months ago

    Use the equation

    P(1)V(1)/T(1) =P(2)V(2)/T(2)

    Where

    P = Pressure

    V = Volume

    T = Temperature

    1 = initial vaalues

    2 = calculated values.

    The above equation can be reduced in three ways: -

    1.

    P(1)V(1) = P(2)(2)

    & 2

    V(1)/T(1) = V(2)/T(2)

    & 3

    P(1)/(T(1) = P(2)/T(2)

    All four equations can be algebraically rearranged.

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