The P-V diagram of a system undergoing thermodynamic transformation is shown in figure- The work done on the system in going from A - B - C is 50 J and 20 calheat is given to the system- The change in internal energy between A and C isB- 70 JC- 84 JD- 134 J

The correct option is D 134 JHeat given Δ Q=20 cal=20× 4.2=84 J. Work done Δ W= 50 J [As process is anticlockwise] By first law of thermodynamics ⇒Δ U=Δ Q ...

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Standard XII

Chemistry

State and Path Variables, Functions

The P-V diagr...

Question

The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from $A \to B \to C$ is 50 J and 20 calheat is given to the system. The change in internal energy between A and C is

34 J

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70 J

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84 J

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134 J

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Solution

The correct option is D 134 J
Heat given $Δ Q = 20 c a l = 20 \times 4.2 = 84 J .$
Work done $Δ W = - 50 J$ [As process is anticlockwise]
By first law of thermodynamics $\Rightarrow Δ U = Δ Q - Δ W = 84 - (- 50) = 134 J$

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The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from A→B→C is 50 J and 20 calheat is given to the system. The change in internal energy between A and C is

The correct option is D 134 JHeat given ΔQ=20 cal=20×4.2=84J. Work done ΔW=−50J [As process is anticlockwise] By first law of thermodynamics ⇒ΔU=ΔQ−ΔW=84−(−50)=134J

The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from $A \to B \to C$ is 50 J and 20 calheat is given to the system. The change in internal energy between A and C is

The correct option is D 134 J
Heat given $Δ Q = 20 c a l = 20 \times 4.2 = 84 J .$
Work done $Δ W = - 50 J$ [As process is anticlockwise]
By first law of thermodynamics $\Rightarrow Δ U = Δ Q - Δ W = 84 - (- 50) = 134 J$