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Homework Help: Another physics problem

  1. Oct 24, 2004 #1
    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
  2. jcsd
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