Special Problems for ME 200 – Fall 2009
Special Problems 27, 28, and 29
Due Friday, November 6, 2009
SP27:
One kilogram of ice at 0
C is added to 7 kg of water at 30
C and 1 bar.
The enthalpy of
melting for ice is 335 kJ/kg.
Consider that the process is adiabatic.
(a) What is the final equilibrium temperature (
C)?
(b) Calculate the entropy production (kJ/K) during this process.
SP28:
An insulated rigid tank initially contains 2.7 kg of carbon dioxide gas at 100 kPa and
27
C.
A rotating paddle wheel adds 200 kJ of work into the system.
Assume that specific heats for carbon dioxide are constant at their 27
C values.
(a) What is the final temperature (
C) of carbon dioxide?
(b) Calculate the entropy change (kJ/K) for carbon dioxide during this process.
Now consider that specific heats for carbon dioxide are not constant.
(c) What is the final temperature (
C) of carbon dioxide?
(d) Determine the entropy change (kJ/K) for carbon dioxide during this process.
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This note was uploaded on 05/15/2010 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue.
 Spring '08
 GAL

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