Martin, Louis Adolphe, 1880- · New York : Wiley · leaf 93
uring the change from B to C. But theloss of internal energy- from J5 to C is represented by thearea Aiv. Therefore this area AiiC also represents thegain in internal energy during the change from A to B. This area representing a gain must be positive so thatwe must start tracing the area at… … Fig. 12, be negative and would indicate a loss of internal energyduring the change of state from {p\, vi) to {p, v).
Mechanics
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