May 2011
Beginner
492 pages
14h 16m
English
Content preview from Heat and Thermodynamics
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3.3 Work Done During Expansion of a Gas at Constant Pressure
Figure 3.4 shows some quantity of air enclosed in a cylinder under an airtight piston occupying the position A1 B1. Let the volume of the gas under the piston be v1 and its pressure be p. Let the air expand at constant pressure forcing the piston to the position A2 B2. Let the mass of air now occupy the volume v2. Let s be the area of the piston. Then the total force on the piston is s p. If d be the distance between the two positions of the piston, the work done in the expansion is spd.
Fig. 3.4 Schematic diagram for work done during expansion at constant pressure
But, sd is ...
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