Question

12 physics question draw a p-v diagram for a change of phase of any substance​

Answer 1

Answer:

We know that 1cal=4.2J

Thus, heat absorbed=ΔQ=20cal=84J,

work done by the system=ΔW=−50J

From first law, change in internal energy ΔU=ΔQ−ΔW

⇒ΔU=84+50=134J

Explanation:

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