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ideal gas is expanded adiabatically into a vacuum. Decide which of q, w, ∆U, and ∆H are positive, negative, or zero.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter3: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 76P: (a) An ideal gas expands adiabatically from a volume of 2.0103 m3 to 2.5103 m3. If the initial...

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Question

1. An ideal gas is expanded adiabatically into a vacuum. Decide which of
q, w, ∆U, and ∆H are positive, negative, or zero.

2. For 1.25 mol of an ideal gas, Pexternal = P = 350 x 103 pa. The
temperature is changed from 135°C to 21.2°C, and Cv,m = 3R/2.
Calculate q, w, ∆U, and ∆H .

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