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4.22 A heat engine absorbs 260 kJ of heat from a source at 325 K and yields a work output of 72 kJ rejecting 100 kJ of heat to a reservoir at 300 K and 88 kJ of heat to another reservoir at 275 K Does this engine violate the laws of thermodynamics?

4.22 A heat engine absorbs 260 kJ of heat from a source at 325 K and yields a work output of 72 kJ rejecting 100 kJ of heat to a reservoir at 300 K and 88 kJ of heat to another reservoir at 275 K Does this engine violate the laws of thermodynamics?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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4.22 question need answer 

This question is from kv Narayanan 

Thermodynamics TEXT BOOK

11:07 PM ← 61 of 63 Sai Prashanth 12.12.22 at 7:53 PM 4.19 A refrigerator is to be used to maintain the temperature of certain storage space at 250 K. The compressor is rated at 250 W and the cooling duty is estimated to be 5104 kJ per day. Determine the fraction of the time the compressor runs if the refrigerator is used in (a) a cold country where the ambient temperature is 290 K and (b) a tropical country where the ambient temperature 310 K. 4.20 How much work must be done in order to cool the air in an otherwise empty room of dimensions 5.0 m5.0 m 3.0 m from 303 K to 295 K when the ambient temperature is (a) 293 K (b) 303 K? Take specific heat of air to be 29 kJ/kmol K and density to be 1.2 kg/m³. 4.21 Liquid helium is produced from its saturated vapour at 4.2 K. The latent heat of vaporisatior of helium at this temperature is 83.3 kJ/kmol. Calculate the minimum work required to produce liquid helium if the ambient temperature is 305 K. 4.22 A heat engine absorbs 260 kJ of heat from a source at 325 K and yields a work output of 72 kJ rejecting 100 kJ of heat to a reservoir at 300 K and 88 kJ of heat to another reservoir at 275 K Does this engine violate the laws of thermodynamics? 4.23 The heat capacity of chloroform in the range 240 K to 330 K is given by Cp=91.47+75 D102T where Cp is in J/mol K and T in K. Calculate the change in molar entropy of chloroform when it is heated from 273 K to 300 K. 4.24 One kilogram of saturated liquid water at 100 kPa is mixed with 5 kg of superheated steam at 100 kPa and 573 K in an insulated container. Assuming that the pressure remains constant during mixing, calculate the entropy generation due to the mixing process. 4.25 In a heat exchanger, air is heated from 293 K to 353 K by means of a second air stream which enters the exchanger at 423 K. The molar flow rates of both the streams are equal and the specific heat of air is 29.3 kJ/kmol K. 2 VoWiFi. K/S î B 2557 i
Transcribed Image Text:11:07 PM ← 61 of 63 Sai Prashanth 12.12.22 at 7:53 PM 4.19 A refrigerator is to be used to maintain the temperature of certain storage space at 250 K. The compressor is rated at 250 W and the cooling duty is estimated to be 5104 kJ per day. Determine the fraction of the time the compressor runs if the refrigerator is used in (a) a cold country where the ambient temperature is 290 K and (b) a tropical country where the ambient temperature 310 K. 4.20 How much work must be done in order to cool the air in an otherwise empty room of dimensions 5.0 m5.0 m 3.0 m from 303 K to 295 K when the ambient temperature is (a) 293 K (b) 303 K? Take specific heat of air to be 29 kJ/kmol K and density to be 1.2 kg/m³. 4.21 Liquid helium is produced from its saturated vapour at 4.2 K. The latent heat of vaporisatior of helium at this temperature is 83.3 kJ/kmol. Calculate the minimum work required to produce liquid helium if the ambient temperature is 305 K. 4.22 A heat engine absorbs 260 kJ of heat from a source at 325 K and yields a work output of 72 kJ rejecting 100 kJ of heat to a reservoir at 300 K and 88 kJ of heat to another reservoir at 275 K Does this engine violate the laws of thermodynamics? 4.23 The heat capacity of chloroform in the range 240 K to 330 K is given by Cp=91.47+75 D102T where Cp is in J/mol K and T in K. Calculate the change in molar entropy of chloroform when it is heated from 273 K to 300 K. 4.24 One kilogram of saturated liquid water at 100 kPa is mixed with 5 kg of superheated steam at 100 kPa and 573 K in an insulated container. Assuming that the pressure remains constant during mixing, calculate the entropy generation due to the mixing process. 4.25 In a heat exchanger, air is heated from 293 K to 353 K by means of a second air stream which enters the exchanger at 423 K. The molar flow rates of both the streams are equal and the specific heat of air is 29.3 kJ/kmol K. 2 VoWiFi. K/S î B 2557 i
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A heat engine absorbs 260kj of heat

From a source at 325k and yields a work out put of 72kj , rejecting 100 kilo Joules of heat to a reservoir at 300 Kelvin and 88 kilo joule of heat to another reservoir at 275 Kelvin. Does this engine violets a law of thermodynamics and why??  

(Hint:the answer is yes it violets thermodynamics law  ) give valid explanation

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