2.45. WP The relationship between the pressure P and volume V of the air in a cylinder during the upstroke of a piston in an air compressor can be expressed as PVk = C where k and C are constants. During a compression test, the following data are taken: P(mm Hg) 760 1140 1520 2280 3040 3800 V(cm3) 48.3 37.4 31.3 24.1 20.0 17.4 Determine the values of k and C that best fit the data. (Give both numerical values and units.) 2.46. WP In modeling the effect of an impurity on crystal growth, the following equation was derived: G – GL Go – G KLСт where C is impurity concentration, GL is a limiting growth rate, G, is the growth rate of the crystal with no impurity present, and KL and m are model parameters. -3 In a particular experiment, Go = 3.00 x 10- mm/min, and G1, = 1.80 × 10¬³ mm/min. Growth rates are measured for several impurity concentrations C (parts per million, or ppm), with the following results: C(ppm) 50.0 75.0 100.0 125.0 150.0 G(mm/ min) × 10° 2.50 2.20 2.04 1.95 1.90 -3 (For example, when C = 50.0 ppm, G = 2.50 × 10° mm/ min). a. Determine K, and m, giving both numerical values and units. b. A solution is fed to a crystallizer in which the impurity concentration is 475 ppm. Estimate the expected crystal growth rate in (mm/min). Then state why you would be extremely skeptical about this result. Answer 2.47. WP Aprocess instrument reading, Z(volts), is thought to be related to a process stream flow rate V(L/s) and pressure P(kPa) by the following expression: Z = av p¢ Process data have been obtained in two sets of runs-one with V held constant, the other with P held constant. The data are as follows: Point 2 3 4 5 6 7 V (L/s) 0.65 1.02 1.75 3.43 1.02 1.02 1.02

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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The problem that is listed below need to be solved and you may access that problem via viewing them through the attached images in this request. **Question Number #2.46**

2.45. WP The relationship between the pressure P and volume V of the air in a cylinder during the upstroke of a piston in an
air compressor can be expressed as
PVk = C
where k and C are constants. During a compression test, the following data are taken:
P(mm Hg) 760 1140 1520 2280 3040 3800
V(cm3)
48.3 37.4 31.3 24.1 20.0 17.4
Determine the values of k and C that best fit the data. (Give both numerical values and units.)
2.46. WP In modeling the effect of an impurity on crystal growth, the following equation was derived:
G – GL
Go – G
KLСт
where C is impurity concentration, GL is a limiting growth rate, G, is the growth rate of the crystal with no impurity present, and
KL and m are model parameters.
-3
In a particular experiment, Go = 3.00 x 10- mm/min, and G1, = 1.80 × 10¬³ mm/min. Growth rates are measured for several
impurity concentrations C (parts per million, or ppm), with the following results:
C(ppm)
50.0 75.0 100.0 125.0 150.0
G(mm/ min) × 10° 2.50 2.20 2.04 1.95 1.90
-3
(For example, when C = 50.0 ppm, G = 2.50 × 10°
mm/ min).
a. Determine K, and m, giving both numerical values and units.
b. A solution is fed to a crystallizer in which the impurity concentration is 475 ppm. Estimate the expected crystal growth rate in
(mm/min). Then state why you would be extremely skeptical about this result.
Answer
2.47. WP Aprocess instrument reading, Z(volts), is thought to be related to a process stream flow rate V(L/s) and pressure
P(kPa) by the following expression:
Z = av p¢
Process data have been obtained in two sets of runs-one with V held constant, the other with P held constant. The data are as
follows:
Point
2
3
4 5 6 7
V (L/s) 0.65 1.02 1.75 3.43 1.02 1.02 1.02

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