I\'m not sure how to find the work. The problem states that thepiston is loaded

Question

I'm not sure how to find the work. The problem states that thepiston is loaded so that the volume change is linear so I cannotfigure out which equation to use. It isn't a constant volumeprocess so I can't use w=pdV and it isn't polyatropic or ideal gasso I can't use any of the specific work equations from chapter8.

A piston/cylinder set up contains 1kg of water at 150kpa, 20C. Thepiston is loaded so that the pressure is linear in volume. Heat isadded from a 600C source until the water is at 1000kpa and 500C.Find the heat transfer and total change in entropy.

Explanation / Answer

But I think you have an expression for P in terms of V (yousaid it is linear). P takes the form P = a*V + b, where and b areconstants.
Thus, integrate P*dV = integrate { aV*dV + b*dV} = aV^2/2 + bV
<= evaluate integral from V1 to V2.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.