   Chapter 12, Problem 25P

Chapter
Section
Textbook Problem

An ideal monatomic gas contracts in an isobaric process from 1.25 m3 to 0.500 m3 at a constant pressure of 1.50 × 105 Pa. If the initial temperature is 425 K, find (a) the work done on the gas, (b) the change in internal energy, (c) the energy transfer Q, and (d) the final temperature.

(a)

To determine
The work done on the gas.

Explanation

Given Info:

The initial volume of the gas is 1.25m3 .

The finial volume of the gas is 0.500m3 .

The pressure of the gas is 1.50×105Pa .

Formula to calculate the work done of the gas is,

W=P(VfVi)

• P is the pressure of the gas
• Vf is the final volume of the gas
• Vi is the final volume of the gas

Substitute 1.50×105Pa for P, 0.500m3 for Vf and 1

(b)

To determine
the change in internal energy.

(c)

To determine
the energy transferred.

(d)

To determine
the finial temperature of the gas.

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