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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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**Text Transcription:** 2. How long does it take to heat a 1,000 m³ deep swimming pool by 10.0°C if there are no heat losses? Assume the water is initially at 20.0°C with the sun directly shining over it and the water is well mixed. Assume the sunlight totals 1.30 kW/m². The heat capacity of water is C = 4200 J/kg·°C and its density is 1000 kg/m³. Ignore any heat losses from the pool. (Ans: 9.0 hours) 3. Heat losses from a hot body at T₁ in a cold environment at T₂ generally follow a rate law in which the losses are proportional to the temperature difference between them, (T₁ - T₂). What is the steady state temperature of a circulating liquid in a roof-mounted solar heater that receives sunlight at rate 1.3 kW/m² and loses heat according to 110 x (T₁ - T₂) W/m²·°C. Assume the outside temperature is 15.0°C. **Table Description:** - **Material**: The materials listed are "Diamond" and three semiconductors: "Semiconductor X," "Semiconductor Y," and "Semiconductor Z." - **Band Gap (eV)**: These values are: - Diamond: 5.5 - Semiconductor X: 1.0 - Semiconductor Y: 2.0 - Semiconductor Z: 3.0 - **Efficiency**: The table includes efficiency values, but only for Diamond, listed as 1.0. This text could be used on an educational website to explain thermal dynamics and semiconductor properties, using examples of heat transfer and material characteristics.
Transcribed Image Text:**Text Transcription:** 2. How long does it take to heat a 1,000 m³ deep swimming pool by 10.0°C if there are no heat losses? Assume the water is initially at 20.0°C with the sun directly shining over it and the water is well mixed. Assume the sunlight totals 1.30 kW/m². The heat capacity of water is C = 4200 J/kg·°C and its density is 1000 kg/m³. Ignore any heat losses from the pool. (Ans: 9.0 hours) 3. Heat losses from a hot body at T₁ in a cold environment at T₂ generally follow a rate law in which the losses are proportional to the temperature difference between them, (T₁ - T₂). What is the steady state temperature of a circulating liquid in a roof-mounted solar heater that receives sunlight at rate 1.3 kW/m² and loses heat according to 110 x (T₁ - T₂) W/m²·°C. Assume the outside temperature is 15.0°C. **Table Description:** - **Material**: The materials listed are "Diamond" and three semiconductors: "Semiconductor X," "Semiconductor Y," and "Semiconductor Z." - **Band Gap (eV)**: These values are: - Diamond: 5.5 - Semiconductor X: 1.0 - Semiconductor Y: 2.0 - Semiconductor Z: 3.0 - **Efficiency**: The table includes efficiency values, but only for Diamond, listed as 1.0. This text could be used on an educational website to explain thermal dynamics and semiconductor properties, using examples of heat transfer and material characteristics.
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