Liquid isobutane is throttled through a valve from an initial state of 360 K and 4000 kPa to a final pressure of 1840 kPa. Estimate the temperature change and the entropy change of the isobutane. The specific heat of liquid isobutane at 360 K is 2.78 J·g-1·°C-1. (For data, use the characteristic properties of pure species table.)   The change in temperature is − K.   The change in entropy is  J·mol-1·K-1.

Introduction to Chemical Engineering Thermodynamics
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Liquid isobutane is throttled through a valve from an initial state of 360 K and 4000 kPa to a final pressure of 1840 kPa. Estimate the temperature change and the entropy change of the isobutane. The specific heat of liquid isobutane at 360 K is 2.78 J·g-1·°C-1. (For data, use the characteristic properties of pure species table.)

 

The change in temperature is − K.

 

The change in entropy is  J·mol-1·K-1.

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