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Another physics problem

  • Thread starter mlee
  • Start date
Hi people,

Who can help me solve this problem?

One mole of an ideal monatomic gas at STP first undergoes an isothermal expansion so that the volume at point b is 2.5times the volume of point a. Next, the heat is extracted at a constant volume so that the pressure drops. The gas is then compressed adiabatically back to the original state.
Question a:
Calcultate the pressures at point b and point c

Question b:
Determine the temperature at point c

Question c:
Determine the work done, heat input or extracted, and the change in entropy for each process.

Question d:
What is the efficiency of this cycle>?

Question e:
WHat is the change in entropy 'delta s' for one complete cycle a->b->c->a? Explain your reasoning

Question f:
In which part of the cycle does the entropy, S, show the greatest decrease? Explain your reasoning

Many thanxxx

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