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A lab sample of gas is taken throug...

A lab sample of gas is taken through cyclic abca shown in the P-V diagram of fig 21-22 the net work done is + 1.5 J . Along paths Ab the change in the internal energy is +3.0 and the magnitude of the work done is 5.0 J Along path ca the energy transferred to the gas as heat is + 2.5 J . How much energy is transferred as heat along (a) path ab and (b) path bc ?

Text Solution

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`+8.0 J , (b ) -9.0 J`
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Knowledge Check

  • In the cyclic process shown on the P-V diagram the magnitude of the work done is :

    A
    `((P_(2)-P_(1))/(2))^2`
    B
    `pi ((V_(2)-V_(1))/(2))^2`
    C
    `pi/4 (P_(2)-P_(1)) (V_(2)-V_(1))`
    D
    `pi (P_(2) V_(2)-P_(1)V_(1))`

  • In the cyclic process shown in the V-P diagram the magnitude of the work is done is

    A
    `pi((P_1-P_2)/(2))^2`
    B
    `pi((V_1-V_2)/(2))^2`
    C
    `(pi)/(4)(P_2-P_1)(V_2-V_1)`
    D
    `pi(P_2V_2-P_1V_1)`

  • A gas is taken through the cycle A rarrB rarr C rarr A , as shown in figure, what is the net work done by the gas?

    A
    ` -2000 J`
    B
    `2000 J`
    C
    `1000 J`
    D
    Zero

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