# PV graph question (trying to determine the work)

1. Jan 24, 2008

1. The problem statement, all variables and given/known data
Look at the PV diagram of a system above. (attached) The units for P and V are atmospheric pressure atm and liter L. Process A to B and B to C are straight lines on it.
How much is the work done by the system from A to C in J?

2. Relevant equations
i know that work is the area under the graph, but when i add up areas, answer is wrong for some reason??

3. The attempt at a solution
W = .5(4*3) + .5(4*1.5) * 152J
= 1596J

this is wrong though
???
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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2. Jan 25, 2008

### physixguru

>>>>Work Done is....[ p*delta V] i.e. pressure multiplied by CHANGE IN VOLUME.

This is enough for a hint...^^^