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The temperature at the inside surface of an oven is 460 °F. The inside wall of the oven is made of brick and is 8 inch thick. The thermal conductivity of the brick is 2.2 Btu/hr.ft?.(°F/ft). The outside of the oven is covered with a 3-inch layer of asbestos as insulation, which has a thermal conductivity of 0.11 Btu/hr.ft?. (°F/ft). If the outer surface of the insulation has a temperature of 100 °F , calculate the amount of heat lost through 2 ft? of wall area in 3 hours. 1345 Btu 840 Btu O 1020 Btu 965 Btu O 910 Btu

The temperature at the inside surface of an oven is 460 °F. The inside wall of the oven is made of brick and is 8 inch thick. The thermal conductivity of the brick is 2.2 Btu/hr.ft?.(°F/ft). The outside of the oven is covered with a 3-inch layer of asbestos as insulation, which has a thermal conductivity of 0.11 Btu/hr.ft?. (°F/ft). If the outer surface of the insulation has a temperature of 100 °F , calculate the amount of heat lost through 2 ft? of wall area in 3 hours. 1345 Btu 840 Btu O 1020 Btu 965 Btu O 910 Btu

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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The temperature at the inside surface of an oven is 460 °F. The inside wall of the oven is made of brick and is 8 inch thick. The thermal conductivity of the brick is 2.2 Btu/hr.ft?.(°F/ft). The outside of the oven is covered with a 3-inch layer of asbestos as insulation, which has a thermal conductivity of 0.11 Btu/hr.ft?. (°F/ft). If the outer surface of the insulation has a temperature of 100 °F , calculate the amount of heat lost through 2 ft² of wall area in 3 hours. 1345 Btu 840 Btu O 1020 Btu 965 Btu 910 Btu
Transcribed Image Text:The temperature at the inside surface of an oven is 460 °F. The inside wall of the oven is made of brick and is 8 inch thick. The thermal conductivity of the brick is 2.2 Btu/hr.ft?.(°F/ft). The outside of the oven is covered with a 3-inch layer of asbestos as insulation, which has a thermal conductivity of 0.11 Btu/hr.ft?. (°F/ft). If the outer surface of the insulation has a temperature of 100 °F , calculate the amount of heat lost through 2 ft² of wall area in 3 hours. 1345 Btu 840 Btu O 1020 Btu 965 Btu 910 Btu
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