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4. A bilayer polymer slab (1.2m long, 1.4m wide, 5 cm thick) is placed on a hot plate, which keeps the side of the slab touching the hot plate at 105C. The thermal conductivity of Layer 1 (2 cm thick) is 0.44 W/mK and the thermal conductivity of Layer 2(3 cm thick) is 0.67 W/m K. If the air surrounding the slab is 27 C and the convective heat transfer coefficient between the top of the slab and the air is 20 W/m²K. What is the rate of heat transfer from the side of the slab touching the hot plate to the air?

4. A bilayer polymer slab (1.2m long, 1.4m wide, 5 cm thick) is placed on a hot plate, which keeps the side of the slab touching the hot plate at 105C. The thermal conductivity of Layer 1 (2 cm thick) is 0.44 W/mK and the thermal conductivity of Layer 2(3 cm thick) is 0.67 W/m K. If the air surrounding the slab is 27 C and the convective heat transfer coefficient between the top of the slab and the air is 20 W/m²K. What is the rate of heat transfer from the side of the slab touching the hot plate to the air?

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
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4. A bilayer polymer slab (1.2m long, 1.4m wide, 5 cm thick) is placed on a hot plate, which keeps the side of the slab touching the hot plate at 105C. The thermal conductivity of Layer 1 (2 cm thick) is 0.44 W/mK and the thermal conductivity of Layer 2(3 cm thick) is 0.67 W/m K. If the air surrounding the slab is 27 C and the convective heat transfer coefficient between the top of the slab and the air is 20 W/m²K. What is the rate of heat transfer from the side of the slab touching the hot plate to the air?
Transcribed Image Text:4. A bilayer polymer slab (1.2m long, 1.4m wide, 5 cm thick) is placed on a hot plate, which keeps the side of the slab touching the hot plate at 105C. The thermal conductivity of Layer 1 (2 cm thick) is 0.44 W/mK and the thermal conductivity of Layer 2(3 cm thick) is 0.67 W/m K. If the air surrounding the slab is 27 C and the convective heat transfer coefficient between the top of the slab and the air is 20 W/m²K. What is the rate of heat transfer from the side of the slab touching the hot plate to the air?
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