Problem 20.38 (Figure 1) shows two processes, A and B, for moving 3.45 × 1022 pa

Question

Problem 20.38 (Figure 1) shows two processes, A and B, for moving 3.45 × 1022 particles of a monatomic ideal gas from state i to state f.

Part A

Which process requires less work done on the gas?

Part B

Which process requires a smaller magnitude of the energy Q transferred thermally to the gas?

2016-17 Q3 PHYS123 Problem 20.38 Problem 20.38 (Figure 1) shows two processes, A and B, for moving 3.45 x 10- particles of a monatomic ideal gas from state i to state f. Figure 1 1 P (kPa) 22.4 9.68 L V (m 1.75 0.45 session.masteringphysics.com Part A Which process requires less work done on the gas? process A process B O Both processes require the same amount of work. Submit My Answers Give Up Part B Which process requires a smaller magnitude of the energy Q transferred thermally to the gas? O process A O process B O Both processes require the same amount of energy. Submit My Answers Give up Part C This question will be shown after you complete previous question(s). Resources previous l 5 of 11 I next a Provide Feedback Continue

Explanation / Answer

A) Process A require less work on gas.

work done is area under p-v graph which is less for process A.

B) Process A require small energy

Since i and f state are same for process A as well as B change in internal energy is same for both. By first law of thermodynamics Q = U + W .

Since U is same for both so Q will be small for that process for which W (work) is small So

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