Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 21, Problem 14SP
To determine
The change in entropy, if two moles of gas undergoes an isothermal free expansion results in doubling in volume.
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When an aluminum bar is temporarily connected between a hot reservoir at 725 K and a cold reservoir at 310 K, 2.50 kJ of energy is transferred by heat from the hot reservoir to the cold reservoir. In this irreversible process, calculate the change in entropy of (a) the hot reservoir, (b) the cold reservoir, and (c) the Universe, neglecting any change in entropy of the aluminum rod. (d) Mathematically, why did the result for the Universe in part (c) have to be positive?
Hi, could I get some help with this macro-connection physics problem involving isothermal expansion?
The set up is:
For an isothermal reversible expansion of two moles of an ideal gas, what is the entropy change of the a) gas and b) the surroundings in J/K to 4 digits of precision if the gas volume quadruples, assuming NA = 6.022e23 and kB = 1.38e-23 J/K?
Thank you.
Experimental measurements of the heat capacity of aluminum at low temperatures (below about 50 K) can be fit to the formula Cv = aT+bT3 ,where Cv is the heat capacity of one mole of aluminum, and the constants a and b are approximately a = 0.00135 J/K2 and b = 2.48 X 10-5 J/K4. From this data, find a formula for the entropy of a mole of aluminum as a function of temperature. Evaluate your formula at T = 1 K and at T = 10 K, expressing your answers both in conventional units (J/K) and as unitless numbers (dividing by Boltzmann's constant).
Chapter 21 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 21 - 21.8 [I] Compute the entropy change of 5.00 g of...Ch. 21 - 21.9 [I] Heat in the amount of 100 kJ is...Ch. 21 - 21.10 [I] Heat in the amount of 100 kJ is...Ch. 21 - 21.11 [I] Heat in the amount of 100 kJ is...Ch. 21 - 21.12 [I] Imagine a flexible chamber containing...Ch. 21 - 21.13 [II] An insulated chamber (allowing no...Ch. 21 - Prob. 14SPCh. 21 - 21.15 [I] By how much does the entropy of 300 g...Ch. 21 - 21.16 [II] An ideal gas was slowly expanded from...Ch. 21 - 21.17 [II] Starting at standard conditions, 3.0...
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