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Two humid gas streams are combined in a heated mixing chamber. The first stream contains 23.5 mole% ethane and 76.5% ethylene on a dry basis and enters the chamber at 25°C and 105 kPa at a rate of 125 L/min. The second stream is humid air, which enters at 75°C and 115 kPa at a rate of 355 L/min. The product stream emerges at 65°C and 1.00 atm. A hygrometer is used to measure the water contents of the two feed streams and the combined product stream. The calibration curve for the hygrometer is a straight line on a semilog plot of y (mole fraction of water) versus R (hygrometer reading), which passes through the points (y = 104, R= 5) and (y = 0.2, R = 90). The following readings are recorded. Hydrocarbon Feed Stream: R = 86.0 Air Feed Stream: R = 12.8 (a) Derive an expression for y(R). (b) Calculate the volumetric flow rate of the product stream and the molar composition of the product gas on a dry basis. (c) Calculate the partial pressure of water in the product gas and the hygrometer reading for this stream.

Two humid gas streams are combined in a heated mixing chamber. The first stream contains 23.5 mole% ethane and 76.5% ethylene on a dry basis and enters the chamber at 25°C and 105 kPa at a rate of 125 L/min. The second stream is humid air, which enters at 75°C and 115 kPa at a rate of 355 L/min. The product stream emerges at 65°C and 1.00 atm. A hygrometer is used to measure the water contents of the two feed streams and the combined product stream. The calibration curve for the hygrometer is a straight line on a semilog plot of y (mole fraction of water) versus R (hygrometer reading), which passes through the points (y = 104, R= 5) and (y = 0.2, R = 90). The following readings are recorded. Hydrocarbon Feed Stream: R = 86.0 Air Feed Stream: R = 12.8 (a) Derive an expression for y(R). (b) Calculate the volumetric flow rate of the product stream and the molar composition of the product gas on a dry basis. (c) Calculate the partial pressure of water in the product gas and the hygrometer reading for this stream.

Introduction to Chemical Engineering Thermodynamics
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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Two humid gas streams are combined in a heated mixing chamber. The first stream contains 23.5 mole% ethane and 76.5% ethylene on a dry basis and enters the chamber at 25°C and 105 kPa at a rate of 125 L/min. The second stream is humid air, which enters at 75°C and 115 kPa at a rate of 355 L/min. The product stream emerges at 65°C and 1.00 atm. A hygrometer is used to measure the water contents of the two feed streams and the combined product stream. The calibration curve for the hygrometer is a straight line on a semilog plot of y (mole fraction of water) versus R (hygrometer reading), which passes through the points (y = 104, R= 5) and (y = 0.2, R = 90). The following readings are recorded. Hydrocarbon Feed Stream: R = 86.0 Air Feed Stream: R = 12.8 (a) Derive an expression for y(R). (b) Calculate the volumetric flow rate of the product stream and the molar composition of the product gas on a dry basis. (c) Calculate the partial pressure of water in the product gas and the hygrometer reading for this stream.
Transcribed Image Text:Two humid gas streams are combined in a heated mixing chamber. The first stream contains 23.5 mole% ethane and 76.5% ethylene on a dry basis and enters the chamber at 25°C and 105 kPa at a rate of 125 L/min. The second stream is humid air, which enters at 75°C and 115 kPa at a rate of 355 L/min. The product stream emerges at 65°C and 1.00 atm. A hygrometer is used to measure the water contents of the two feed streams and the combined product stream. The calibration curve for the hygrometer is a straight line on a semilog plot of y (mole fraction of water) versus R (hygrometer reading), which passes through the points (y = 104, R= 5) and (y = 0.2, R = 90). The following readings are recorded. Hydrocarbon Feed Stream: R = 86.0 Air Feed Stream: R = 12.8 (a) Derive an expression for y(R). (b) Calculate the volumetric flow rate of the product stream and the molar composition of the product gas on a dry basis. (c) Calculate the partial pressure of water in the product gas and the hygrometer reading for this stream.
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