EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
4th Edition
ISBN: 9781119192107
Author: BULLARD
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Chapter 7, Problem 7.32P
Saturated steam at a gauge pressure of 2.0 bar is to be used to heat a stream of ethane. The ethane enters a heat exchanger at 16°C and 1.5 bar gauge at a rate of 795 m3/min and is heated at constant pressure to 93°C. The steam condenses and leaves the exchanger as a liquid at 27°C. The speci?c enthalpy of ethane at the given pressure is 941 kJ/kg at 16°C and 1073 kJ/kg at 93°C.
(a) How much energy (kW) must be transferred to the ethane to heat it from 16°C to 93°C?
(b) Assuming that all the energy transferred from the steam goes to heat the ethane, at what rate in m3/s must steam be supplied to the exchanger? If the assumption is incorrect, would the calculated value be too high or too low?
(c) Should the heat exchanger be set up for cocurrent or countercurrent ?ow (see the following schematic diagram)? Explain. (Hint: One of them will not work at all.)
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= 10 bar and T = 300
1. A process has been proposed whereby an ideal gas is taken from P
K to P 1 bar and T = 500 K in a closed system. During the process the system (ideal gas)
does 1,000 kJ of work and receives 5,430 kJ of heat from the surroundings. The temperature
of the surroundings is constant at 300 K.
Ideal gas
(a)
Cp
R
Determine the amount (in kmol) of gas present in the system.
heat capacity:
= 3.6+0.5 10-³T
(T in K)
The boiler in an apartment building uses propane (C3H8) to heat
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excess air at 25°C and 1 atm. After all of the propane is
combusted, the product gas contains a 10.0:1 molar ratio of
CO2 to CO and leaves the boiler at 25°C. Heat from the boiler
is transferred to a pure water stream at 50°C and 1.0 bar, which
is converted into saturated steam at 20 bar, with no heat lost to
the surroundings in the process. What mass of water is heated
in this process?
Molecule
(Formula)
(kJ/mol)
-393.5 (g)
Carbon
dioxide
(CO2)
Carbon
-110.52 (g)
monoxide
(CO)
Hydrogen
(H2)
Nitrogen
(N2)
Охуgen
(O2)
Propane
(C;Hs)
Hot Water (out).
Flue
Gas Shutoff Valve -
Cold Water (in)
-119.8(1)
-103.8(g)
-285.84(1)
Gas Supply Line-
Cold Water
Shutoff Valve
Water
(H20)
-241.83(g)
Temperature /
Pressure Relief
Valve
Water Line
Overflow Pipe.
Tank Insulation
- Dip Tube
Drain Valve
Gas Burner Control-…
Carbon dioxide (CO2) contained in a
piston-cylinder arrangement, initially at 5
bar and 400 K, undergoes an expansion
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Chapter 7 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
Ch. 7 - A certain gasoline engine has an efficiency of...Ch. 7 - Prob. 7.2PCh. 7 - Prob. 7.3PCh. 7 - Prob. 7.4PCh. 7 - Liquid ethanol is pumped from a large storage tank...Ch. 7 - Air at 300°C and 130 kPa flows through a...Ch. 7 - Prob. 7.7PCh. 7 - Prob. 7.8PCh. 7 - Prob. 7.9PCh. 7 - Prob. 7.10P
Ch. 7 - Prob. 7.11PCh. 7 - Prob. 7.12PCh. 7 - A piston?tted cylinder with a 6-cm inner diameter...Ch. 7 - Prob. 7.14PCh. 7 - Prob. 7.15PCh. 7 - Prob. 7.16PCh. 7 - Prob. 7.17PCh. 7 - Prob. 7.18PCh. 7 - Prob. 7.19PCh. 7 - Prob. 7.20PCh. 7 - Air is heated from 25°C to 140°C prior to entering...Ch. 7 - Prob. 7.22PCh. 7 - Prob. 7.23PCh. 7 - Prob. 7.24PCh. 7 - Prob. 7.25PCh. 7 - The conversion of the kinetic energy of wind to...Ch. 7 - Prob. 7.27PCh. 7 - Prob. 7.28PCh. 7 - Liquid water is fed to a boiler at 24°C and 10 bar...Ch. 7 - Prob. 7.30PCh. 7 - Prob. 7.31PCh. 7 - Saturated steam at a gauge pressure of 2.0 bar is...Ch. 7 - Prob. 7.33PCh. 7 - Prob. 7.34PCh. 7 - Prob. 7.35PCh. 7 - Prob. 7.36PCh. 7 - Prob. 7.37PCh. 7 - Prob. 7.38PCh. 7 - Prob. 7.39PCh. 7 - Prob. 7.40PCh. 7 - Prob. 7.41PCh. 7 - Jets of high-speed steam are used in spray...Ch. 7 - The following diagram shows a simpli?ed version of...Ch. 7 - Three hundred L/h of a 20 mole% C3H880 nC4H10gas...Ch. 7 - Air at 38°C and 97% relative humidity is to be...Ch. 7 - A mixture containing 65.0 mole% acetone (Ac) and...Ch. 7 - Superheated steam at T1(°C) and 20.0 bar is...Ch. 7 - Prob. 7.48PCh. 7 - Prob. 7.49PCh. 7 - Eight fluid ounces (1 qt = 32 oz) of a beverage in...Ch. 7 - Prob. 7.51PCh. 7 - Prob. 7.52PCh. 7 - Prob. 7.53PCh. 7 - Prob. 7.54PCh. 7 - Prob. 7.55PCh. 7 - Prob. 7.56PCh. 7 - Prob. 7.57PCh. 7 - Prob. 7.58PCh. 7 - Prob. 7.59PCh. 7 - Prob. 7.60PCh. 7 - Prob. 7.61PCh. 7 - Prob. 7.62PCh. 7 - Arsenic contamination of aquifers is a major...Ch. 7 - Prob. 7.64PCh. 7 - Prob. 7.65P
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