When system is subdivided intensive variables t p extensive variables v e h heat capacity c
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when system is subdivided? Intensive variables: T, P Extensive variables: V, E, H, heat capacity C PowerPoint PPT Presentation


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When system is subdivided intensive variables t p extensive variables v e h heat capacity c

when system is subdivided?

Intensive variables: T, P

Extensive variables: V, E, H, heat capacity C


When system is subdivided intensive variables t p extensive variables v e h heat capacity c

  • One mole of an ideal gas initially at 27oC and 1 atm pressure is heated and allowed to expand reversibly at constant pressure until the final temperature is 327oC. For this gas, Cv=20.8 JK-1mol-1 and is constant over the temperature range. (R=0.08206 Latm K-1mol-1 = 8.314 JK-1mol-1 )

  • (a) Calculate the work w done on the gas in this expansion

  • (b) What are and for the process ?

  • (C) What is the amount of heat q absorbed by the gas ?

  • 2. One mole of an ideal gas initially at 300 K is expanded from an initial pressure of 10 atm to a final pressure of 1 atm. Calculate and the final

  • temperature T2 for this expansion carried out according to each of the following paths. The molar heat capacity at constant volume for the gas is

  • Cv=3/2R.

  • (a) An isothermal, reversible expansion

  • (b) An expansion against a constant external pressure of 1 atm in thermally isolated (adiabatic) system

  • (c) An expansion against zero external pressure in an adiabatic system.


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