Asked by Anonymous

What does the slope represent in a volume vs temp. graph for air?
Answered by DrBob222
Read about that here.
https://chemistrygod.com/charles-law-graph
It spells out the slope in volume vs T for ANY gas, ideal behavior of course @ constant pressure.
Answered by Anonymous
So constant pressure would be the slope because the slope is k? When the equation is V=kT. So n= # of mole would not be considered part of the constant?
Answered by bobpursley
Some call the slope coefficient of volumetric expansion.


Answered by DrBob222
@ anonymous---No, k is the slope of the line. Did you read the link I gave you. It states clearly that the slope is k in V = kT. The site also states that V = kT when T is in kelvin and pressure is constant.
Answered by Anonymous
Yes, I understand k is the slope of the line, but I guess what I'm wondering is since k is the constant - what does it represent in terms of the ideal gas law? I was assuming it would be both p and n being constant right? The pressure is constant with Charles law , but would n also play a role in "k" being the slope.
Answered by DrBob222
Anything not listed is constant. Pressure, number of moles, humidity, surroundings, the composition of the air and so on into the night. Regarding the composition and number of moles I would think we understand that the experimental set up used uses the same sample but varied the T and measured the volume with the same set up as opposed to different set ups used in different rooms or different buildings.