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Constant amount of ideal gas is kept inside a cylinder by a piston. Then the gas...

Constant amount of ideal gas is kept inside a cylinder by a piston. Then the gas expands isobarically. Compare the initial (i) and the final (f) physical quantities of the gas to each other.

The internal energy Uf is ... Ui.

The temperature Tf is ... Ti.

The volume Vf is ... Vi.

The entropy Sf is ... Si.

The pressure pf is ... pi.

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Answer #1

A) As pressure is kept constant there according to ideal gas law volume is directly proportional to the temperature. Since gas is expanding therefore it's volume is increasing. therefore temperature will also increase. Internal energy of gas is a function of the gas temperature. i.e. Uf > Ui

B) From above explanation Tf > Ti

C) As gas is expanding; Vf > Vi

D) Entropy is measurement of the disturbance in the system. entropy will increase with temperature. Sf > Si

E) Pf = Pi , since pressure is kept constant.

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