2. Reversible and Irrev Processes Heat Capacity

# 2. Reversible and Irrev Processes Heat Capacity - For the...

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2. Reversible and Irreversible Processes; Heat capacities Read in text: Sections 2.3 (b)-(e), 2.4 (b) Exercises: 2.2(b), 2.4(b), 2.13(b) skip the part on enthalpy Problem: 2.6 (p. 73) --------------------------------------------------------------------------------------------------------- Calculating the pV work… Expansion into a vacuum Expansion against constant external pressure Reversible vs. irreversible isothermal expansion Plot these processes on indicator diagram The limiting reversible process. . ‘almost’ a succession of equilibrium states. Why is the reversible process called ‘reversible’?

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Unformatted text preview: For the reversible case 2 2 1 1 ( ) ( ) V V ext V V w P V dV P V dV = -= -Important inequalities for both expansion and compression , &lt; irrev rev irrev rev q q w w These are algebraic inequalities. . the sign of each quantity is important Example: a cyclic process Show q and w as areas on indicator diagrams Heat capacity at constant volume Define heat capacity C v and discuss ( ) V V U C T T e = &amp; Then v dU C dT = and 2 1 ( ) T v T U C T dT = Back to the cyclic process; consider an ideal gas Calculate q, w, and U for each step...
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## This note was uploaded on 05/18/2010 for the course CH 353 taught by Professor Wyatt during the Spring '10 term at University of Texas-Tyler.

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2. Reversible and Irrev Processes Heat Capacity - For the...

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