Chapter 20, Problem 44 SN The motor in a refrigerator has power P. If the freezi

Question

Chapter 20, Problem 44 SN


The motor in a refrigerator has power P. If the freezing compartment is at temperature TL and the outside air is at temperature TH (both temperatures measured in kelvin), and assuming the efficiency of a Carnot refrigerator, what is the maximum amount of energy that can be extracted as heat from the freezing compartment in a time t? State your answer in terms of the given variables.

Qmax =









Question Attempts: Unlimited










Copyright © 2000-2011 by John Wiley & Sons, Inc. or related companies. All rights reserved.

Explanation / Answer

For refrizirator coeffitient of performance    K   = T_L   / (T_H - T_ L) here   T_L = lower temperature           T_H = heigher temperature and again coeffitient of performance      K     =   heat extracted (Q) / work done (W) Q = K *W ...................(1) POWER   P   = Work done(W) / time (t) W = P * t ....................(2) plug the value (2) in (1) we get Q = K * P * t hete   t should be in second Power in   watt

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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