Q.8(a) Calculate the entropy of a substance at 200 K and 400 K if- (a) Heat capacity of solid is 1.5 J /K-mol at 15 K and 20 J /K-mol for greater than 15 K. (b) Heat capacity for liquid phase is 0.2T - 5 J /K-mol. (c) Heat capacity for gas phase is 50 + 5*10-3 J /K-mol. (d) Enthalpy of freezing is – 7.5 kJ/mol (Tm = 150 K) (e) Enthalpy of Condensation is – 25 kJ/mol (Tb = 250 K) [5] (b) The vapour pressure data for a gas at different temperature is given below: T/K 1125 1175 1225 1275 p (Pa) 400 1400 3280 7100 Evaluate by graphical method/calculation the enthalpy of vaporization and also the vapor pressure at 1200 K.
Q.8(a) Calculate the entropy of a substance at 200 K and 400 K if- (a) Heat capacity of solid is 1.5 J /K-mol at 15 K and 20 J /K-mol for greater than 15 K. (b) Heat capacity for liquid phase is 0.2T - 5 J /K-mol. (c) Heat capacity for gas phase is 50 + 5*10-3 J /K-mol. (d) Enthalpy of freezing is – 7.5 kJ/mol (Tm = 150 K) (e) Enthalpy of Condensation is – 25 kJ/mol (Tb = 250 K) [5] (b) The vapour pressure data for a gas at different temperature is given below: T/K 1125 1175 1225 1275 p (Pa) 400 1400 3280 7100 Evaluate by graphical method/calculation the enthalpy of vaporization and also the vapor pressure at 1200 K.
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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Q.8(a) Calculate the entropy of a substance at 200 K and 400 K if-
(a) Heat capacity of solid is 1.5 J /K-mol at 15 K and 20 J /K-mol for greater than
15 K.
(b) Heat capacity for liquid phase is 0.2T - 5 J /K-mol.
(c) Heat capacity for gas phase is 50 + 5*10-3 J /K-mol.
(d) Enthalpy of freezing is – 7.5 kJ/mol (Tm = 150 K)
(e) Enthalpy of Condensation is – 25 kJ/mol (Tb = 250 K)
[5]
(b) The vapour pressure data for a gas at different temperature is given below:
T/K 1125 1175 1225 1275
p (Pa) 400 1400 3280 7100
Evaluate by graphical method/calculation the enthalpy of vaporization and also the
vapor pressure at 1200 K.
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