# Work Done by Gas PV Diagram

1. ### Malicious

16
Problem.

Find Work done by each path.

My Solution.
a-b, c-d >> W=P(delta)V
a-c, b-d >> W=0

My Question.
What is the work done by the gas (path a-d)?

My Thoughts.
There is a change in both pressure and volume. However, the equation to find the work in this situation is "W=P(delta)V". There is no (delta)P.

2. ### JJ420

20
could anyone help him?I'm kinda interested in the answer to this as well!

Last edited: Jan 25, 2007
3. ### turdferguson

312
Are you familiar with integration? The answer is always found by calculating the area under the curve, which is exactly what you did for all the other ones. In this case, the area is a trapezoid

4. ### JJ420

20
so the work done from a to d is W = deltaP * deltaV
very good, P is no longer constant so integrate that as well
as if it was that simple

Last edited: Jan 25, 2007