# Thermodynamic Work

by keemosabi
Tags: thermodynamic, work
 P: 109 1. The problem statement, all variables and given/known data The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 2.5 multiplied by 105 Pa, and the horizontal divisions represent 1.5 multiplied by 10-3 m3. Determine the work done (including algebraic sign) in each segment of the path. (c) C to A J 3. The attempt at a solution Isn't it just the area under the curve from C to A? Area of a trapezoid? 5625 J?
HW Helper
P: 6,684
 Quote by keemosabi 3. The attempt at a solution Isn't it just the area under the curve from C to A? Area of a trapezoid? 5625 J?
Not quite. Is work being done by the gas or on the gas? What does this do to the sign of the area/work?

AM
P: 109
 Quote by Andrew Mason Not quite. Is work being done by the gas or on the gas? What does this do to the sign of the area/work? AM
Ahh. I see. Since the volume is decreasing the work done by the gas is negative.

Thank you for the help.

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