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8 Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air envi- ronment for which T = 325 K and h = 20 W/m².K. Assuming the properties of the steel to be k = 40 W/m.K, p=7800 kg/m³, and c = 600 J/kg K, estimate the time required for the cooling process.

8 Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air envi- ronment for which T = 325 K and h = 20 W/m².K. Assuming the properties of the steel to be k = 40 W/m.K, p=7800 kg/m³, and c = 600 J/kg K, estimate the time required for the cooling process.

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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8 Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air envi- ronment for which T = 325 K and h = 20 W/m².K. Assuming the properties of the steel to be k = 40 W/m-K, p=7800 kg/m³, and c = 600 J/kg K, estimate the time required for the cooling process.
Transcribed Image Text:8 Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air envi- ronment for which T = 325 K and h = 20 W/m².K. Assuming the properties of the steel to be k = 40 W/m-K, p=7800 kg/m³, and c = 600 J/kg K, estimate the time required for the cooling process.
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