I'm confused as to how to determine that pressure is held constant for a process based on a change in temperature vs a change in volume. I want to say that AB and AD are isobaric, but can't match that feeling with an equation... Help?

Here's an image of the illustration of a TV-graph such that the final V is double the intial V (#4): http://imm.io/VPVz

Question

I'm confused as to how to determine that pressure is held constant for a process based on a change in temperature vs a change in volume. I want to say that AB and AD are isobaric, but can't match that feeling with an equation... Help?

Here's an image of the illustration of a TV-graph such that the final V is double the intial V (#4): http://imm.io/VPVz

anonymous · Answer

Oh, here's the file... Thanks!

anonymous · Answer

since they tell you that the gas is ideal you can use the equation $$PV= Nk _{b}T$$

anonymous · Answer

That's what I wanted to do, but wasn't sure if that was valid for the change in V, and T. So, then I could say, AB, AD, and AF are isobaric?

anonymous · Answer

If those equations remain constant then yes

anonymous · Answer

Awesome, thank you soooo much! <3