Thermodynamics Quiz 1

Question 1

During a thermodynamic process, the entropy of a reaction closed system decreased $$(	ext{is negative})$$. Then the reaction is __.

Accepted Answer

Non-spontaneous

Answer

Spontaneous

Answer

At equilibrium

Answer

None of these

Question 2

When an air compressor compresses air, change in entropy is __.

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

None of the above.

Question 3

During a lecture about reversible systems, a student asked another student next to him for a real life example of a perfectly reversible system. But he couldn’t answer. Why?

Accepted Answer

Most of the processes are dissipative in nature.

Answer

energy is not dissipated in any natural process.

Answer

There is no such process as a reversible process.

Answer

None of the above

Question 4

We have taken two vessels filled with diatomic ideal gas of equal volume. There are two lids for these containers. For vessel 1, it is movable and for vessel 2 it is not movable. Now, we are heating both vessels similarly. Then, the temperature of the gas in vessel 1 increases by 30 K. What will be the temperature of gas in vessel 2?

Accepted Answer

42 K

Answer

46 K

Answer

36 K

Answer

38 K

Question 5

An ideal gas is having a temperature of 200 K. In a process $$P=kV$$, $$(	ext{where k is a positive constant})$$, its volume changes from $$V$$ to $$3V$$. Then the change in temperature of the gas will be

Accepted Answer

1800 K

Answer

900 K

Answer

1200 K

Answer

2700 K