A diatomic ideal gas undergoes a thermodynamic change according to the P - V diagram shown in the figure. The total heat given to the gas is nearly (use l n 2 = 0.7 )

Question

A diatomic ideal gas undergoes a thermodynamic change according to the P - V diagram shown in the figure. The total heat given to the gas is nearly (use l n 2 = 0.7 ), 2.5 P 0 V 0, 1.4 P 0 V 0, 39 P 0 V 0, 1.1 P 0 V 0

MARKS App · Accepted Answer

Q A B = Δ U A B + W A B , where W A B = 0 Δ U A B = f 2 n R Δ T ⇒ Δ U A B = f 2 Δ P V ⇒ Δ U A B = 5 2 Δ P V ⇒ Δ U A B = 2.5 Δ P V According to the first law of thermodynamics Q A B = Δ U A B + W A B Where W A B = 0 therefore Q A B = Δ U A B ⇒ Q A B = 2.5 P 0 V 0 Process B C Q B C = Δ U B C + W B C ⇒ Q B C = 0 + 2 P 0 V 0 l n 2 Q B C = 1.4 P 0 V 0 Q n e t = Q A B + Q B C = 3.9 P 0 V 0

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