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Category > Management Posted 28 Sep 2017 My Price 7.00

carbon dioxide and helium

7.4Equal molar amounts of carbon dioxide and helium are maintained at the same temperature and pressure. Which has the greater value for exergy relative to the same reference environment? Assume the ideal gas model with constant cy for each gas. There are no significant effects of motion and gravity.

7.5       Two solid blocks, each having mass m and specific heat c,

 

Critical point

T

 

 

 

 

Dead State

4

T0        0   5

  1       T1 > T0

 

 

p0

  2      T2 > T0

3                           p6 p0

 

6

 

v

and initially at temperatures T1 and T2, respectively, are brought into contact, insulated on their outer surfaces, and allowed to come into thermal equilibrium.

(a)   Derive an expression for the exergy destruction in terms of m, c, T1, T2, and the temperature of the environment, T0.

(b)   Demonstrate that the exergy destruction cannot be

negative.

(c)   What is the source of exergy destruction in this case?

Answers

Maurice Tutor
(5)
Status NEW Posted 28 Sep 2017 02:09 PM My Price 7.00

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