(a)
The energy which must be added to the system by heat which goes from A through B to C.
(a)
Answer to Problem 40P
The energy which must be added to the system by heat which goes from A through B to C is
Explanation of Solution
Write the equation of first law of
Here,
Write the equation of conservation of energy.
Here,
Substitute
Conclusion:
Substitute
Therefore, the energy which must be added to the system by heat which goes from A through B to C is
(b)
The work done on the system from C to D if pressure at A is five times that of point C.
(b)
Answer to Problem 40P
The work done on the system from C to D if pressure at A is five times that of point C is
Explanation of Solution
Write the equation to calculate the work done on the system from C to D.
Here,
Here,
The pressure at point A is five times that of point C.
And the volume is,
Substitute
Conclusion:
Substitute
Therefore, the work done on the system from C to D if pressure at A is five times that of point C is
(c)
The energy exchanged with the surroundings by heat along the green path from C to A.
(c)
Answer to Problem 40P
The energy exchanged with the surroundings by heat along the green path from C to A is
Explanation of Solution
Write the equation of first law of thermodynamics.
Here,
Write the equation to calculate work done along the green path from C to A.
Here, the volume
Substitute 0 for
Substitute
Substitute
Conclusion:
Therefore, the energy exchanged with the surroundings by heat along the green path from C to A is
(d)
The energy which must be added to the system by heat which goes from C to D.
(d)
Answer to Problem 40P
The energy which must be added to the system by heat which goes from C to D
is
Explanation of Solution
Write the equation of first law of thermodynamics.
Here,
Conclusion:
Substitute
Therefore, the energy which must be added to the system by heat which goes from C to D is
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Chapter 20 Solutions
Physics For Scientists And Engineers With Modern Physics, 9th Edition, The Ohio State University
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