Very cold water (5°C) is heated at atmospheric pressure (1 atm) until saturated vapor is formed. (a) Draw an enthalpy path for the water. (b) Calculate the specific enthalpy change (kJ/mol) for each step in the path, and calculate the total specific enthalpy change (kJ/mol). (c) Compare the total enthalpy change from the enthalpy path to the total enthalpy change using the steam tables.
Very cold water (5°C) is heated at atmospheric pressure (1 atm) until saturated vapor is formed. (a) Draw an enthalpy path for the water. (b) Calculate the specific enthalpy change (kJ/mol) for each step in the path, and calculate the total specific enthalpy change (kJ/mol). (c) Compare the total enthalpy change from the enthalpy path to the total enthalpy change using the steam tables.
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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Question
Very cold water (5°C) is heated at atmospheric pressure (1 atm) until saturated vapor is formed.
(a)
Draw an enthalpy path for the water.
(b)
Calculate the specific enthalpy change (kJ/mol) for each step in the path, and calculate the total specific enthalpy change (kJ/mol).
(c)
Compare the total enthalpy change from the enthalpy path to the total enthalpy change using the steam tables.
(d)
Compute the ratio of latent heat to sensible heat.
(e)
The process is completed in reverse, cooling saturated water vapor to very cold water. Will the magnitude of the specific enthalpy change increase, decrease, or stay the same?
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