Constant Pressure

[Victoria Zheng--2F]

Hello. I don't quite understand what is the meaning of there is no expansion work done when the pressure is constant?

[Rachel Yu 1G]

Do you mean no expansion work done when the volume is constant? Since w= -PdeltaV, no change in volume makes deltaV (and therefore w) equal to 0.

[Jessica Li 4F]

When pressure is constant, there is expansion work done, which can be calculated using the equation w = -P(deltaV). However, at constant volume, delta V is 0, so w will be 0 and no work will be done.

[205291012]

There is no expansion work done at constant volume. This is because for expansion work to be done the piston needs to move from a lower volume to a higher volume.

There is expansion work done at constant pressure.