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Get Full Access to Thermodynamics: An Engineering Approach - 8 Edition - Chapter 7 - Problem 217p
Get Full Access to Thermodynamics: An Engineering Approach - 8 Edition - Chapter 7 - Problem 217p

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# A constant volume tank filled with 2kg of air rejects heat

ISBN: 9780073398174 56

## Solution for problem 217P Chapter 7

Thermodynamics: An Engineering Approach | 8th Edition

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Problem 217P

Problem 217P

A constant volume tank filled with 2kg of air rejects heat to a heat reservoir at300 K. During the process the temperature of the air in the tank decreases to the reservoir temperature. Determine the expressions for the entropy changes for the tank and reservoir and the total entropy change or entropy generated of this isolated system. Plot these entropy changes as functions of the initial temperature of the air. Comment on your results. Assume constant specific heats for air at 300 K.

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Weather Climate and Society Weather Variables:  Barometric pressure  Air temperature  Dew point temperature  Humidity  Wind Direction  Precipitation  Cloud Cover Barometric Pressure:  Gravitational effect on mass of air  Expressed as millibars (mb, or 1kg/cm^2)  Measured using barometer  Standard sea level pressure is 1013.2 millibars or kilopascal (kPa)  Higher elevation >> less air on top o Denver is a Mile higher than sea level Weather Station Model: Air Temperature Air temperature Is expressed as Kelvin

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