Thermodynamics Question 317

Question: Choose the correct statement for an isolated system.

Options:

A) $ \Delta U(C\to D)= $ negative

B) $ \Delta Q(A\to B)= $ positive

C) $ \Delta U=(A-B-C-D-A)\ne 0 $

D) $ \Delta Q(D\to A)=0 $

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Answer:

Correct Answer: D

Solution:

[d] Idea In an isolated system no heat is exchanged between system and surrounding during process.

Here as system is isolated $ \Delta Q=0, $ for any part of system in graph.

TEST Edge Question from p-V curve are very important from examination point of view, conceptual clearity is necessary to tackle.

These problems, a problem which seem difficult may involve a basic concept with which it can be solved easily.

Work done in p-V curve, change in internal energy etc., are common questions which are asked in examination.



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