The reaction A ? B takes place in a steady-state, adiabatic, tubular reactor. Conversion of A to B is 50%. Which is the correct energy balance? H is molar enthalpy (kJ/mol). A А, В A - B a. Ha" = 0.5H, out. 0.5AHX. d. Ha" = 0.5HA out + 0.5H3° in in out + 0.5HR out + b. 0.5HĄ" = 0.5H° e. HAm + 0.5AHxn = 0.5H out + 0.5H3° in out out s. none of the choices

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 reaction A ? B takes place in a steady-state, adiabatic, tubular reactor.
Conversion of A to B is 50%. Which is the correct energy balance? H is molar
enthalpy (kJ/mol).
A
А, В
A - B
a. HA" = 0.5H out + 0.5HRout +
0.5ΔΗ
d. HA" = 0.5H °ut + 0.5H;out
in
out
in
b. 0.5HA" = 0.5HB
e. Нат + 0.5АН,xn — 0.5HА
0.5H3°
out
out
c. none of the choices
Transcribed Image Text:The reaction A ? B takes place in a steady-state, adiabatic, tubular reactor. Conversion of A to B is 50%. Which is the correct energy balance? H is molar enthalpy (kJ/mol). A А, В A - B a. HA" = 0.5H out + 0.5HRout + 0.5ΔΗ d. HA" = 0.5H °ut + 0.5H;out in out in b. 0.5HA" = 0.5HB e. Нат + 0.5АН,xn — 0.5HА 0.5H3° out out c. none of the choices
A closed fixed-volume vessel contains a mixture of benzene and toluene in vapor-
liquid equilibrium at 1.5 bar. The vapor phase, which also contains 50 mol% air,
occupies 90% of the total volume of the container. The mole fraction of benzene in
the liquid phase is 0.40. A special valve is suddenly opened to remove all the
molecules initially present in the vapor phase (i.e., they are sucked out of the
container). After the valve is closed and the system returns to equilibrium at the
same temperature, what is the mole fraction of benzene in the liquid phase?
c. >0.40
d. <0.40
a. need more information
b. 0.40
Transcribed Image Text:A closed fixed-volume vessel contains a mixture of benzene and toluene in vapor- liquid equilibrium at 1.5 bar. The vapor phase, which also contains 50 mol% air, occupies 90% of the total volume of the container. The mole fraction of benzene in the liquid phase is 0.40. A special valve is suddenly opened to remove all the molecules initially present in the vapor phase (i.e., they are sucked out of the container). After the valve is closed and the system returns to equilibrium at the same temperature, what is the mole fraction of benzene in the liquid phase? c. >0.40 d. <0.40 a. need more information b. 0.40
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