Question From the following data for water: Determine its heat of vaporization (AH vap.) Temperature (°C) Pvap (torr) 1/T(K) Pvap. (atm) Ln(Pvap. (atm)) 0 4.579 10 9.209 20 17.535 25 23.756 31.824 55.324 149.400 233.700 525.800 30 40 60 70 90 Ln(Pap.) ‚)= R=8.314 J/K.mol a. 64.22 kJ/mol b. 35.28 kJ/mol c. 60.25 kJ/mol d. 43.41 kJ/mol e. 46.14 kJ/mol ΔΗ, vap. R (7) + C
Question From the following data for water: Determine its heat of vaporization (AH vap.) Temperature (°C) Pvap (torr) 1/T(K) Pvap. (atm) Ln(Pvap. (atm)) 0 4.579 10 9.209 20 17.535 25 23.756 31.824 55.324 149.400 233.700 525.800 30 40 60 70 90 Ln(Pap.) ‚)= R=8.314 J/K.mol a. 64.22 kJ/mol b. 35.28 kJ/mol c. 60.25 kJ/mol d. 43.41 kJ/mol e. 46.14 kJ/mol ΔΗ, vap. R (7) + C
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:Question From the following data for water:
Determine its heat of vaporization (AH vap.)
Temperature (°C) Pvap. (torr) 1/T(K) Pvap. (atm) Ln(Pvap. (atm))
0
10
20
25
30
40
60
70
90
Ln(Pap.) =
R=8.314 J/K.mol
a. 64.22 kJ/mol
b. 35.28 kJ/mol
c.
60.25 kJ/mol
d.
43.41 kJ/mol
e. 46.14 kJ/mol
4.579
9.209
17.535
23.756
31.824
55.324
149.400
233.700
525.800
ΔΗ. vap.
²)+c C
R T
Transcribed Image Text:Exercise Determine AH and AS for the auto-ionization of water.
2 H₂O (1)
Temperature (°C)
0
25
35
40
50
Ln(K) = −
-
H30* (aq) + OH (aq)
Ln(Kw)
AH° 1
R
Kw
1.14 × 10-¹5
1.00 × 10-¹4
2.09 × 10-¹4
2.92 × 10-¹4
5.47 × 10-14
+
AS°
R
Q1) What is the value of R2?
1
T(K)
a.0.99938 b.0.99940 c.0.99955 d.0.99945 e.0.99950
Q2) What is the intercept value?
a.-9.24948 b.-9.24952 c.9.24952 d.-9.24950 e.9.24948
Q3) What is the enthalpy value AH (in kJ/mol)?
a.57.04 b.57.08 c.57.02 d. 57.06 e.57.01
Q4) What is the value of entropychange AS (J/k.mol)?
a.76.9 b.76.7 c.-76.9 d.-77.9 e.-76.7
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