Q14:- Saturated steam (p = P*Mwt/RT) at a gauge pressure of 2.0 atm and T=120°C is to be used to heat a stream of ethane. The ethane (Mwt-30kg/kgmole) enters a heat exchanger at 16°C and 1.5 atm gauge at a rate of 795 m/min and is heated at constant pressure to 93°C. The steam condenses and leaves the exchanger as a liquid at 27°C. The specific enthalpy of ethane at the given pressure is 941 kJ/kg at 16 °C and 1073 kJ/kg at 93°C. How much energy (kW) must be transferred to the ethane to heat it from 16°C to 93°C? Assuming that all the energy transferred from the steam goes to heat the ethane, at what rate in m/s must steam be supplied to the exchanger? Given that Cpsteam= 5.980 KJ/ kg.ºc, Cpm of liquid water=4.205 KJ/ kg.°c, Awater=2257 KJ/Kg, R (Gas constant = 8.314 atm. m/mol.K). %3D
Q14:- Saturated steam (p = P*Mwt/RT) at a gauge pressure of 2.0 atm and T=120°C is to be used to heat a stream of ethane. The ethane (Mwt-30kg/kgmole) enters a heat exchanger at 16°C and 1.5 atm gauge at a rate of 795 m/min and is heated at constant pressure to 93°C. The steam condenses and leaves the exchanger as a liquid at 27°C. The specific enthalpy of ethane at the given pressure is 941 kJ/kg at 16 °C and 1073 kJ/kg at 93°C. How much energy (kW) must be transferred to the ethane to heat it from 16°C to 93°C? Assuming that all the energy transferred from the steam goes to heat the ethane, at what rate in m/s must steam be supplied to the exchanger? Given that Cpsteam= 5.980 KJ/ kg.ºc, Cpm of liquid water=4.205 KJ/ kg.°c, Awater=2257 KJ/Kg, R (Gas constant = 8.314 atm. m/mol.K). %3D
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:Q14:- Saturated steam (p = P*Mwt/RT) at a gauge pressure of 2.0 atm and T=120°C is to
be used to heat a stream of ethane. The ethane (Mwt=30kg/kgmole) enters a heat exchanger
at 16°C and 1.5 atm gauge at a rate of 795 m/min and is heated at constant pressure to
93°C. The steam condenses and leaves the exchanger as a liquid at 27°C. The specific
enthalpy of ethane at the given pressure is 941 kJ/kg at 16 °C and 1073 kJ/kg at 93°C. How
much energy (kW) must be transferred to the ethane to heat it from 16°C to 93°C?
Assuming that all the energy transferred from the steam goes to heat the ethane, at what
rate in m/s must steam be supplied to the exchanger? Given that Cpsteam= 5.980 KJ/ kg.°c,
Cpm of liquid water=4.205 KJ/ kg.°c, Awater=2257 KJ/Kg,
m/mol.K).
R (Gas constant = 8.314 atm.
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