1.

When a system is taken from state A to state B along the path ACB, 80 k cal of heat flows into the system and 30 k cal of work is done. If U_A = 0 and U_D = 40k cal, find the heat absorbed in the process AD

Answer»

Solution :`U_A=0, U_D = 40 K CAL `
`du_(AD)=40 k cal `
`dw_(ADB)=10K cal `
`dw_(DB)=0 "since" dV = 0 `
`dQ_(AD)=40+10=50` k cal


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