Homework Help is Here – Start Your Trial Now!
Science
Physics
Problem 5-Thermodynamics A refrigerator operates with a Coefficient of Performance COP = 3 and a constant power P = 1 kWatt. 100 liters of water are placed inside the refrigerator, and nothing else. The initial water temperature is Twater = 20 °C. (a) Find the time it takes for the water to freeze completely. (b) Find the entropy change of water and the total entropy change, assuming that the temperature of the surrounding environment is TH = 20 °C. (c) If TH= 20 °C and T₁ = 0 °C, find the COP of an ideal refrigerator operating according to the Carnot cycle.

Problem 5-Thermodynamics A refrigerator operates with a Coefficient of Performance COP = 3 and a constant power P = 1 kWatt. 100 liters of water are placed inside the refrigerator, and nothing else. The initial water temperature is Twater = 20 °C. (a) Find the time it takes for the water to freeze completely. (b) Find the entropy change of water and the total entropy change, assuming that the temperature of the surrounding environment is TH = 20 °C. (c) If TH= 20 °C and T₁ = 0 °C, find the COP of an ideal refrigerator operating according to the Carnot cycle.

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
See similar textbooks
icon
Related questions
Question
I don’t understand the solution Please explain to me how to do it
Problem 5-The modynamics (a) COP = and W=Pt In order to freese 100 I of water with mitial temperature Twater, we must extract from the water t= QL W Q₁ = M₂ COT + mos har -100 kg (2080) 1.0x 10 kcal The time it takes is obtained from Therefor COP-P 1.4 x 10"s Aswater - Therefore COP ideal 1.0x10 Keal 273 k = Tost #1 AS tot - ( 5 1 - 4) 2/12 - 0.24 2 * 9.0 kcal k (C) For a carrot refrigerador, q= 1 QH-QL = 44 273 k 20 k negatire 10x 10 Kest ixiled is The charge of extrogy of the environment it Reas 3x 1 kwat positive 37 X T₂ = 14. (b) Use QH = Nt Q₁ = (1 + = 2 ) QL 놓아 The entropy charge of water is QH = TL Aswater - Muc ln - M AS where Tip= 273 K and Tw = 293k. We can approximate dvd so -10- AS water- ان 4
Transcribed Image Text:Problem 5-The modynamics (a) COP = and W=Pt In order to freese 100 I of water with mitial temperature Twater, we must extract from the water t= QL W Q₁ = M₂ COT + mos har -100 kg (2080) 1.0x 10 kcal The time it takes is obtained from Therefor COP-P 1.4 x 10"s Aswater - Therefore COP ideal 1.0x10 Keal 273 k = Tost #1 AS tot - ( 5 1 - 4) 2/12 - 0.24 2 * 9.0 kcal k (C) For a carrot refrigerador, q= 1 QH-QL = 44 273 k 20 k negatire 10x 10 Kest ixiled is The charge of extrogy of the environment it Reas 3x 1 kwat positive 37 X T₂ = 14. (b) Use QH = Nt Q₁ = (1 + = 2 ) QL 놓아 The entropy charge of water is QH = TL Aswater - Muc ln - M AS where Tip= 273 K and Tw = 293k. We can approximate dvd so -10- AS water- ان 4
(c) Find the total entropy change (meteorite plus sea). Is it positive or negative? Problem 5-Thermodynamics A refrigerator operates with a Coefficient of Performance COP = 3 and a constant power P = 1 kWatt. 100 liters of water are placed inside the refrigerator, and nothing else. The initial water temperature is Twater = 20 °C. (a) Find the time it takes for the water to freeze completely. (b) Find the entropy change of water and the total entropy change, assuming that the temperature of the surrounding environment is TH = 20 °C. (c) If TH= 20 °C and T₁ = 0 °C, find the COP of an ideal refrigerator operating according to the Carnot cycle.
Transcribed Image Text:(c) Find the total entropy change (meteorite plus sea). Is it positive or negative? Problem 5-Thermodynamics A refrigerator operates with a Coefficient of Performance COP = 3 and a constant power P = 1 kWatt. 100 liters of water are placed inside the refrigerator, and nothing else. The initial water temperature is Twater = 20 °C. (a) Find the time it takes for the water to freeze completely. (b) Find the entropy change of water and the total entropy change, assuming that the temperature of the surrounding environment is TH = 20 °C. (c) If TH= 20 °C and T₁ = 0 °C, find the COP of an ideal refrigerator operating according to the Carnot cycle.
Expert Solution
steps

Step by step

Solved in 6 steps with 8 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Second law of thermodynamics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
College Physics
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
Physics for Scientists and Engineers
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:
9780321820464
Author:
Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:
Addison-Wesley
College Physics: A Strategic Approach (4th Editio…
College Physics: A Strategic Approach (4th Editio…
Physics
ISBN:
9780134609034
Author:
Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:
PEARSON
SEE MORE TEXTBOOKS