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5/29 MCQs for:

The Laws of Thermodynamics

In an isothermal process, there is no change in:

Heat.

Volume.

Pressure.

Temperature.

Is it possible to transfer heat from a hot reservoir to a cold reservoir?

No.

Yes; this will happen naturally.

Theoretically yes, but it hasn

Yes, but work will have to be done.

An ideal gas is compressed isothermally from 30 L to 20 L. During this process, 6.0 J of energy is expended by the external mechanism that compressed the gas. What is the change of internal energy for this gas?

Zero.

6.0 J.

None is correct.

-6.0 J.

When the first law of thermodynamics, Q = DU + W, is applied to an ideal gas that is taken through an isochoric process:

Q = 0.

W = 0.

DU = 0.

None is correct.

An ideal gas is compressed to one-half its original volume during an isothermal process. The final pressure of the gas:

Increases to more than twice its original value.

Does not change.

Increases to twice its original value.

Increases to less than twice its original value.