Question

Volume Pressure Constant, k

(mL) (kPa) (P/V or P*V)

5.8mL 169.01kPa 980k

10.8mL 89.74kPa 969k

13.3mL 72.27kPa 798k

15.8mL 59.98kPa 948k

18.3mL 51.69kPa 946k

20.8mL 46.03kPa 957k

PROCESSING THE DATA

1. If the volume is doubled from 5.0 mL to 10.0 mL, what does your data show happens to the pressure? Show the pressure values in your answer.

2. If the volume is halved from 20.0 mL to 10.0 mL, what does your data show happens to the pressure? Show the pressure values in your answer.

3. If the volume is tripled from 5.0 mL to 15.0 mL, what does your data show happened to the pressure? Show the pressure values in your answer.

4. From your answers to the first three questions and the shape of the curve in the plot of the pressure versus volume, do you think the relationship between the pressure and the volume of a confined gas is direct or inverse? Explain your answer.

Answer 1

Q1.

from the list, we can see that increase in volume implies a decrease in pressure

Q2.

if we halve the volume, then the pressure increases by 2x factor

Q3.

If we triple the volume, then the pressure will decrease by a factor of 3x, that is 1/3 of the original value

Q4.

The value is essentially the same

PV = C

where C is a constant

so

V = C*(1/P)

volume is inversely proportional to pressure, so any increase in pressure will favour the same decrease in volume (same factor)