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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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Section
BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

Three moles of an argon gas are at a temperature of 275 K. Calculate (a) the kinetic energy per molecule, (b) the root-mean-square (rms) speed of an atom in the gas, and (c) the internal energy of the gas.

(a)

To determine
The average kinetic energy.

Explanation

Given Info: The temperature is 275 K.

Formula to calculate the average kinetic energy is,

Ek=32kT

  • k is the Boltzmann constant.
  • T is the temperature

Substitute 275 K for T and 1.38×1023JK1 for k in the above equation to get Ek .

Ek=32(1

(b)

To determine
The root mean square speed.

(c)

To determine
The internal energy.

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