Question
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500 kmol/h of an air stream at a pressure of 2 atm is to be heated...
500 kmol/h of an air stream at a pressure of 2 atm is to be heated from 15 celsius to 90 celsius in a heat exchanger with 600 kPa steam condensing in the shell side of the heat exchanger. Steam enters the exchanger as a saturated vapor and leaves as a saturated liquid.
A) How much steam would be required if a conventional heat
exchanger were used? what is the total entropy change during this
process?
B) How much steam would be required if the process of heating the
air was carried out by using the heat transferred from the steam to
drive a reversible carnot engine and by using the air stream as the
heat sink? what would be the total work output of this engine?
Solutions
Amanda K answered 2 years agoRelated Solutions
An air stream is saturated with a vapor (B) at 130F and 1 atm pressure. It...
An air stream is saturated with a vapor (B) at 130F and 1 atm
pressure. It is cooled down to 80F where some of the B is
condensed and separated from the vapor stream. The remaining vapor
stream is then reheated back to 130F.
a. What is the mole fraction of B in the air coming out of the
process?
b. For an inlet flow rate of 2000 ft3/min of air saturated
with B, what would be the flow rate...
As 2 moles of sirenite is heated under a constant pressure of 1 atm it undergoes...
As 2 moles of sirenite is heated under a constant pressure of 1
atm it undergoes a solid phase transition, at a temperature of 750
K, from α-sirenite to β-sirenite. The molar specific heat capacity
of sirenite varies with thermodynamic temperature, T, such that Cvm
= 2.50 x 10-6 T^2 Jmol-1K-1.
a) Calculate the entropy change of the sirenite between the
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b) By what factor does the number of accessible...
If a sample of A(g) at 2.10 atm is heated to 500K, what is the pressure...
If
a sample of A(g) at 2.10 atm is heated to 500K, what is the
pressure of B(g) at equilibrium?
2A(g)--> B(g)
Kp=8.74*10^-5 at 500 K
500 kgmol/h of a gas stream containing 2% of component A is to be purified using...
500 kgmol/h of a gas stream containing 2% of component A is to
be purified using gas absorption. The vent from the absorber can
contain no more than 0.5 kgmol/h of A. Two scrubbing liquids, P and
Q, are available.
a. For liquid Q, m=0.45. How many stages are required in the
scrubber for 1.5 times the minimum liquid rate? The incoming Q
contains no A. 2
b. For liquid P, m=0.25. If liquid P is used in the scrubber...
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A stream of carbon dioxide flows at a rate of 15.0 kmol/h. Use
the truncated-viralequation-of-state to find the volume flow-rate
at 60.0 atm and 70.0 oC.
A stream of carbon dioxide flows at a rate of 15.0 kmol/h. Use the truncated-viralequation-of-state to...
A stream of carbon dioxide flows at a rate of 15.0 kmol/h. Use
the truncated-viralequation-of-state to find the volume flow-rate
at 60.0 atm and 70.0 oC.
Air at 480Kpa is expanded adiabatically to a pressure of 94Kpa. It is then heated at...
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It is then heated at constant volume until it again attains its
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A mixture of isobutylene (0.350 atm partial pressure at 500 K) and HCl(0.550 atm partial pressure...
A mixture of isobutylene (0.350 atm partial pressure at 500 K)
and HCl(0.550 atm partial pressure at 500 K) is allowed to reach
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The equilibrium constant KpKp for the gas-phase thermal
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K:
(CH3)3CCl(g)⇌(CH3)2C=CH2(g)+HCl(g)
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nitrogen, n-butane and n-pentane at 500 ºC and an unknown pressure,
is cooled isobarically to a temperature of 105 ºC and fed into a
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If the vapor fraction V/F in the drum is equal to 0.5, determine
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A process stream flowing at 35 kmol/h contains 15 mole% H2 and the remainder 1-butene. The...
A process stream flowing at 35 kmol/h contains 15 mole% H2 and
the remainder 1-butene. The stream pressure is 10.0 atm absolute,
the temperature is 50 oC and the velocity is 150 m/min. Determine
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