Chapter 3, Problem 1. One mole of an ideal monatomic gas is expanded from an initial state at 3 bar and 450 K to a final state at 2 bar and 250 K. (a) Choose two different paths for this expansion, specify them carefully, and calculate w and q for each path. (b) Calculate AU and AS for each path.

Chapter 3, Problem 1. One mole of an ideal monatomic gas is expanded from an initial state at 3 bar and 450 K to a final state at 2 bar and 250 K. (a) Choose two different paths for this expansion, specify them carefully, and calculate w and q for each path. (b) Calculate AU and AS for each path.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter3: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 74P: The temperature of n moles of an ideal gas changes from T1 to T2 in a quasi-static adiabatic...

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Chapter 3, Problem 1. One mole of an ideal monatomic gas is expanded from an initial
state at 3 bar and 450 K to a final state at 2 bar and 250 K.
(a) Choose two different paths for this expansion, specify them carefully, and calculate w and q
for each path.
(b) Calculate AU and AS for each path.

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Step 1: Determine the given data:

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Step 2: a) Draw the path of the cycle:

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Step 3: Calculate the Volume and Temperature at each state:

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Step 4: Calculate the work done in each process:

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Step 5: Calculate heat exchange q for each path:

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Step 6: b) Calculate the change in internal energy delta U for each path:

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Step 7: Calculate the change in entropy delta S in each path:

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