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A long rod 40 mm in diameter, fabricated from sapphire and initially at a uniform temperature of 800 K, is suddenly cooled in a fluid at 300 K having a heat transfer coefficient of h = 1115- After 35 seconds the rod is wrapped in insulation m²K and experiences no heat losses from that time forward. Properties of sapphire (aluminum oxide): p = 3970 , c, = 1068 kgK' kg m3' k = 22.3, a = 5.259 × 10-6m² mk ' At the time (35 seconds after being placed in the 300 K fluid) the rod is wrapped in insulation, what is the temperature at the CENTER AND SURFACE of the rod?

A long rod 40 mm in diameter, fabricated from sapphire and initially at a uniform temperature of 800 K, is suddenly cooled in a fluid at 300 K having a heat transfer coefficient of h = 1115- After 35 seconds the rod is wrapped in insulation m²K and experiences no heat losses from that time forward. Properties of sapphire (aluminum oxide): p = 3970 , c, = 1068 kgK' kg m3' k = 22.3, a = 5.259 × 10-6m² mk ' At the time (35 seconds after being placed in the 300 K fluid) the rod is wrapped in insulation, what is the temperature at the CENTER AND SURFACE of the rod?

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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A long rod 40 mm in diameter, fabricated from sapphire and initially at a uniform temperature of 800 K, is suddenly cooled in a fluid at 300 K having a heat transfer coefficient of h = 1115- After 35 seconds the rod is wrapped in insulation m²K and experiences no heat losses from that time forward. kg m³' Properties of sapphire (aluminum oxide): p = 3970 9, C, = 1068 k = 22.3. kgK a = 5.259 × 10-6 m²) mK At the time (35 seconds after being placed in the 300 K fluid) the rod is wrapped in insulation, what is the temperature at the CENTER AND SURFACE of the rod?
Transcribed Image Text:A long rod 40 mm in diameter, fabricated from sapphire and initially at a uniform temperature of 800 K, is suddenly cooled in a fluid at 300 K having a heat transfer coefficient of h = 1115- After 35 seconds the rod is wrapped in insulation m²K and experiences no heat losses from that time forward. kg m³' Properties of sapphire (aluminum oxide): p = 3970 9, C, = 1068 k = 22.3. kgK a = 5.259 × 10-6 m²) mK At the time (35 seconds after being placed in the 300 K fluid) the rod is wrapped in insulation, what is the temperature at the CENTER AND SURFACE of the rod?
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