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(a)
The P-V diagram.
(a)
Answer to Problem 74P
The P-V diagram is shown in figure 1.
Explanation of Solution
Given:
The initial pressure is
The initial volume is
The final volume is
Calculation:
Consider the given data, the pressure versus volume graph for the process is shown below.
Figure 1
Conclusion:
Therefore, the P-V diagram is shown in figure 1.
(b)
The temperature at end of each part of cycle.
(b)
Answer to Problem 74P
The temperature at the end of cycle 1, 2 and 3 are
Explanation of Solution
Formula used:
The expression for temperature for portion 1 is given by,
The expression for temperature for portion 2 is given by,
The expression for temperature for portion 3 is given by,
Calculation:
The temperature for portion1 is calculated as,
The temperature for portion2 is calculated as,
The temperature for portion3 is calculated as,
Conclusion:
Therefore, the temperature at the end of cycle 1, 2 and 3 are
(c)
The head absorbed and work done during each cycle.
(c)
Answer to Problem 74P
The heat absorbed for process 1, 2 and 3 are
Explanation of Solution
Formula used:
The expression for heat absorbed for portion 1 is given by,
The expression for heat absorbed for portion 2 is given by,
The expression for heat absorbed for portion 3 is given by,
The expression for work for portion 1 is given by,
The expression for work done for portion 3 is given by,
Calculation:
The heat absorbed for portion1 is calculated as,
The work done for portion1 is calculated as,
The heat absorbed for portion2 is calculated as,
The heat absorbed for portion3 is calculated as,
The work done for portion2 is zero because it is process with constant volume.
The work done for portion3 is calculated as,
Conclusion:
Therefore, the heat absorbed for process 1, 2 and 3 are
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Chapter 18 Solutions
Physics for Scientists and Engineers, Vol. 1
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