5.8 The mercury thermometer of problem 5.6 is allowed to come to equilibrium in the room temp at 75 deg F.Then it is immersed in a oil bath for a length of time less than 1 sec and quickly removed from the bath and re exposed to 75 deg F ambient condition. It may be estimated that the heat transfer coefficient to the thermometer in air is 1/5th that in oil bath. If 10 sec after the thermometer is removed from the bath it reads 98 Deg F. Estimate the length of time that the thermometer was in the bath.

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
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5.8 The mercury thermometer of problem 5.6 is allowed to come to
equilibrium in the room temp at 75 deg F.Then it is immersed in a oil
bath for a length of time less than 1 sec and quickly removed from the
bath and re exposed to 75 deg F ambient condition. It may be estimated
that the heat transfer coefficient to the thermometer in air is 1/5th that in
oil bath. If 10 sec after the thermometer is removed from the bath it reads
98 Deg F. Estimate the length of time that the thermometer was in the bath.
Transcribed Image Text:5.8 The mercury thermometer of problem 5.6 is allowed to come to equilibrium in the room temp at 75 deg F.Then it is immersed in a oil bath for a length of time less than 1 sec and quickly removed from the bath and re exposed to 75 deg F ambient condition. It may be estimated that the heat transfer coefficient to the thermometer in air is 1/5th that in oil bath. If 10 sec after the thermometer is removed from the bath it reads 98 Deg F. Estimate the length of time that the thermometer was in the bath.
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