Question

What does the slope represent in a volume vs temp. graph for air?

Answer 1

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.

Answer 2

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?

Answer 3

Some call the slope coefficient of volumetric expansion.

Answer 4

@ 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.

Answer 5

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.

Answer 6

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.