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Get Full Access to An Introduction To Thermal Physics - 1 Edition - Chapter 7 - Problem 44p
Get Full Access to An Introduction To Thermal Physics - 1 Edition - Chapter 7 - Problem 44p

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# Number of photons in a photon gas.(a) Show that the number

ISBN: 9780201380279 40

## Solution for problem 44P Chapter 7

An Introduction to Thermal Physics | 1st Edition

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Problem 44P

Number of photons in a photon gas.

(a) Show that the number of photons in equilibrium in a box of volume V at temperature T is

The integral cannot be done analytically; either look it up in a table or evaluate it numerically.

(b) How does this result compare to the formula derived in the text for the entropy of a photon gas? (What is the entropy per photon, in terms of k?)

(c) Calculate the number of photons per cubic meter at the following temperatures 300 K; 1500 K (a typical kiln); 2.73 K (the cosmic background radiation).

Step-by-Step Solution:
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Ch 16 Spontaneity, Entropy, and Free Energy I. 16.1: Spontaneous Processes and Entropy a. A process is said to be spontaneous if it occurs without outside intervention. May be fast or slow. Thermodynamics can tell us the direction in which a process will occurs but can say nothing about the speed. i. Rate of reactions depends on many factors life activation energy, temperature, concentration and catalysts: can be explained by using a simple collision model b. The driving force for spontaneous processes is an increase in the entropy of the universe i. Entropy can be viewed as a measure of molecular randomness

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##### ISBN: 9780201380279

This textbook survival guide was created for the textbook: An Introduction to Thermal Physics , edition: 1. The full step-by-step solution to problem: 44P from chapter: 7 was answered by , our top Physics solution expert on 07/05/17, 04:29AM. The answer to “Number of photons in a photon gas.(a) Show that the number of photons in equilibrium in a box of volume V at temperature T is The integral cannot be done analytically; either look it up in a table or evaluate it numerically.________________(b) How does this result compare to the formula derived in the text for the entropy of a photon gas? (What is the entropy per photon, in terms of k?)________________(c) Calculate the number of photons per cubic meter at the following temperatures 300 K; 1500 K (a typical kiln); 2.73 K (the cosmic background radiation).” is broken down into a number of easy to follow steps, and 96 words. Since the solution to 44P from 7 chapter was answered, more than 320 students have viewed the full step-by-step answer. This full solution covers the following key subjects: photon, Photons, entropy, gas, integral. This expansive textbook survival guide covers 10 chapters, and 454 solutions. An Introduction to Thermal Physics was written by and is associated to the ISBN: 9780201380279.

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