I don’t understand the solution Please explain to me how to do it Problem 5-The modynamics(a)COP =and W=PtIn order to freese 100 I of water withmitial temperature Twater, we must extractfrom the watert=QLWQ₁ = M₂ COT + mos har-100 kg (2080)1.0x 10 kcalThe time it takes is obtained fromThereforCOP-P1.4 x 10"sAswater -ThereforeCOP ideal1.0x10 Keal273 k=Tost #1AS tot - ( 5 1 - 4) 2/12 - 0.24 2* 9.0 kcalk(C) For a carrot refrigerador, q= 1QH-QL=44273 k20 knegatire10x 10 Kest ixiled is The charge of extrogy of the environment itReas3x 1 kwatpositive37 XT₂= 14.(b) Use QH = Nt Q₁ = (1 + = 2 ) QL놓아The entropy charge of water isQH =TLAswater - Muc ln - MASwhere Tip= 273 K and Tw = 293k.We can approximatedvd so-10-AS water-ان4 (c) Find the total entropy change (meteorite plus sea). Is it positive or negative?Problem 5-ThermodynamicsA 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 ofwater 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 COPof an ideal refrigerator operating according to the Carnot cycle.

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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.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter18: Heat Engines, Entropy, And The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 46P

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