• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Another physics problem

  • Thread starter mlee
  • Start date
24
0
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
 

Want to reply to this thread?

"Another physics problem" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top