6th Edition

ISBN: 9781260440027

Author: CENGEL

Publisher: MCG

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It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. T…

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Textbook Question

Chapter 1, Problem 145P

A cold bottled drink ( m = 2.5 kg , c p = 4200 J/kg .K ) at 5 o C is left on a table in a room. The average temperature of the drink is observed to rise to 15 o C in 30 min. The average rate of heat transfer to the drink is

23 W
29 W
58 W
88 W
122 W

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Chapter 1, Problem 144P

Chapter 1, Problem 146P

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Required information Water initially at 200 kPa and 300°C is contained in a piston-cylinder device fitted with stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor and the piston rests on the stops. Then the water continues to cool until the pressure is 100 kPa. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Water 200 kPa 300°C On the T-V diagram, sketch, with respect to the saturation lines, the process curves passing through the initial, intermediate, and final states of the water. Label the T, P, and V values for end states on the process curves. Please upload your response/solution by using the controls provided below.

A piston-cylinder device contains 0.87 kg of refrigerant-134a at -10°C. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15°C. Use data from the tables. R-134a -10°C Determine the change in the volume of the cylinder of the refrigerant-134a if the specific volume and enthalpy of R-134a at the initial state of 90.4 kPa and -10°C and at the final state of 90.4 kPa and 15°C are as follows: = 0.2418 m³/kg, h₁ = 247.77 kJ/kg 3 v2 = 0.2670 m³/kg, and h₂ = 268.18 kJ/kg The change in the volume of the cylinder is m

Chapter 1 Solutions

HEAT+MASS TRANSFER:FUND.+APPL.(LOOSE)

Ch. 1 - How does the science of heat transfer differ from...Ch. 1 - What is the driving force for (a) heat transfer,...Ch. 1 - How do rating problems in heat transfer differ...Ch. 1 - What is the difference between the analytical and...Ch. 1 - What is the importance of modeling in engineering?...Ch. 1 - When modeling an engineering process, how is the...Ch. 1 - On a hot summer day, a student turns his fan on...Ch. 1 - Consider two identical rooms, one with a...Ch. 1 - Prob. 9CP Ch. 1 - Prob. 10CP

Ch. 1 - Prob. 11CP Ch. 1 - An ideal gas is heated from 50C to 80C (a) at...Ch. 1 - What is heat flux? How is it related to the heat...Ch. 1 - What are the mechanisms of energy transfer to a...Ch. 1 - A logic chip used in a computer dissipates 3 W of...Ch. 1 - Consider a 150-W incandescent lamp. 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What...Ch. 1 - Consider a house in Atlanta, Georgia, that is...Ch. 1 - Prob. 120P Ch. 1 - A 4m5m6m and room is to be heated by one ton (1000...Ch. 1 - Engine valves (cp=440J/kg.Kandp=7840kg/m3) are to...Ch. 1 - Prob. 123P Ch. 1 - Prob. 124P Ch. 1 - A 0.3 -cm-thick, 12-cm-high, and 18-cm-long...Ch. 1 - A 40-cm-long, 800-W electric resistance heating...Ch. 1 - It is well known that wind makes the cold air feel...Ch. 1 - An engine block with a surface area measured to be...Ch. 1 - Prob. 129P Ch. 1 - Prob. 130P Ch. 1 - Prob. 131P Ch. 1 - Consider a person standing in a room maintained at...Ch. 1 - Prob. 133P Ch. 1 - Prob. 134P Ch. 1 - Prob. 135P Ch. 1 - Prob. 136P Ch. 1 - Prob. 137P Ch. 1 - Prob. 138P Ch. 1 - Prob. 139P Ch. 1 - Prob. 140P Ch. 1 - Prob. 141P Ch. 1 - Prob. 142P Ch. 1 - A 2-kW electric resistance heater submerged in...Ch. 1 - Prob. 144P Ch. 1 - A cold bottled drink (m=2.5kg,cp=4200J/kg.K) at...Ch. 1 - Prob. 146P Ch. 1 - Air enters a 12-m-long, 7-cm-diameter pipe at 50oC...Ch. 1 - Prob. 148P Ch. 1 - Steady heat conduction occurs through a...Ch. 1 - Heat is lost through a brick wall (k=0.72W/m.K),...Ch. 1 - Prob. 151P Ch. 1 - A 40-cm-long, 0.4-cm-diameter electric resistance...Ch. 1 - Prob. 153P Ch. 1 - Prob. 154P Ch. 1 - Over 90 percent of the energy dissipated by an...Ch. 1 - On a still, cleat night, the sky appears to be a...Ch. 1 - Prob. 157P Ch. 1 - Prob. 158P Ch. 1 - A persons head can be approximated as a...Ch. 1 - A person standing in a room loses heat to the air...Ch. 1 - Write an essay on how microwave ovens work, and...Ch. 1 - Using information form the utility bill for the...Ch. 1 - It is well know that at the same outdoor air...

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A cold bottled drink ( m = 2.5 kg , c p = 4200 J/kg .K ) at 5 o C is left on a table in a room. The average temperature of the drink is observed to rise to 15 o C in 30 min. The average rate of heat transfer to the drink is 23 W 29 W 58 W 88 W 122 W

Solution Summary: The author explains the rate of heat transfer to the drink. The initial and final temperature of the egg is 5°C.

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Chapter 1 Solutions