[borg]

I did 3 experiments dealing with pressure/volume, volume/temperature, and pressure/temperature.
I graphed the data and found the linear relationship for each one, as well as the linear regression.

Here is my problem: I need to write Boyles' law using a constant, and both forms of Charles' law using a constant.

I know that the forms are: PV = constant; V/T = constant; P/T = constant.

The problem is that when I plug in the values, I am not getting a constant. For example, when I multiply 2 different sets of pressure and volume data, I get different numbers. And the numbers are even farther off when I use Charles' law. I am using Kelvin for temperature, so what am I doing wrong.
Thank you for any responses.

[Yggdrasil]

PV = constant only when temperature is constant.
V/T = constant only when pressure is constant.
P/T = constant only when volume is constant.

[ezaga1]

The reason why you are not gettiing a constant value is probably because the other factors where not kept constant.

For Boyle's Law:
PV=constant
Here temperature must be kept constant.

Charle's Law:
V/T=constant.
Here pressure must be kept constant.

If all this measures are taken properly, all your values will be correct. I hope i answered your question.

[Borek]

I graphed the data and found the linear relationship for each one, as well as the linear regression.

The problem is that when I plug in the values, I am not getting a constant.

If you got a correct relationship in the first step, you should get correct result in the second step - unless you did some other mistake. Post your results.

[ezaga1]

From my own point of view, the main reason why your are not getting a constant value is because the others factors are not constant. For
Boyle's Law:
PV=constant, temperature must be kept constant.
Charle's:
V/T=constant, pressure must be kept constant.
Of you observe this condition your values are going to be right. I just hope this will help you.

[Borek]

From my own point of view, the main reason why your are not getting a constant value is because the others factors are not constant. For
Boyle's Law:
PV=constant, temperature must be kept constant.
Charle's:
V/T=constant, pressure must be kept constant.
Of you observe this condition your values are going to be right. I just hope this will help you.

How does this answer differs from your previous one?