A 40 kg steel casting (Cp = 0.5 kJ.kg-¹·K-¹) at a temperature of 450°C is quenched in 150 kg of oil (Cp = 2.5 kJ.kg-¹.K−¹) at 25°C. If there are no heat losses, what is the change in entropy of (a) the casting, (b) the oil, and (c) both considered together?
A 40 kg steel casting (Cp = 0.5 kJ.kg-¹·K-¹) at a temperature of 450°C is quenched in 150 kg of oil (Cp = 2.5 kJ.kg-¹.K−¹) at 25°C. If there are no heat losses, what is the change in entropy of (a) the casting, (b) the oil, and (c) both considered together?
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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Transcribed Image Text:A 40 kg steel casting (Cp = 0.5 kJ·kg¯¹·K¯¹) at a temperature of 450°C is quenched
in 150 kg of oil (Cp = 2.5 kJ.kg-¹·K-¹) at 25°C. If there are no heat losses, what is the
change in entropy of (a) the casting, (b) the oil, and (c) both considered together?
5.12. For an ideal gas prove that:
AS
V
5- / C / + 1/
=
R
RT
Vo
To
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