Thermodynamics: An Engineering Approach
9th Edition
ISBN: 9781259822674
Author: Yunus A. Cengel Dr., Michael A. Boles
Publisher: McGraw-Hill Education
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Chapter 13.3, Problem 58P
An insulated rigid tank is divided into two compartments by a partition. One compartment contains 7 kg of oxygen gas at 40°C and 100 kPa, and the other compartment contains 4 kg of nitrogen gas at 20°C and 150 kPa. Now the partition is removed, and the two gases are allowed to mix. Determine (a) the mixture temperature and (b) the mixture pressure after equilibrium has been established.
FIGURE P13–58
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A rigid tank that contains 5.2 kg of N2 at 25°C and 550 kPa is connected to another rigid tank that contains 7.2 kg of O2 at 25°C and
150 kPa. The valve connecting the two tanks is opened, and the two gases are allowed to mix. If the final mixture temperature is 25°C,
determine the volume of each tank and the final mixture pressure. The gas constants of N2 and O2 are 0.2968 and
0.2598 kPa-m³/kg-K, respectively. The universal gas constant is 8.314 kPa-m³/kmol-K. Use the table containing the molar mass, gas
constant, and critical-point properties.
N₂
25°C
550 kPa
The volume of the N2 tank is
The volume of the O2 tank is
The final mixture pressure is
m3
Im³
kPa.
0₂
25°C
150 kPa
A mixture of 5 kg of Hydrogen and 26
kg of Nitrogen are contained in a
piston cylinder assembly at a pressure
of 6.78 MPa and a temperature of 125
K. heat is transferred to the device and
the mixture expands at a constant
pressure until the temperature rises to
135 K. Determine the heat transfer in
kJ during the process by treating the
mixture as a non-ideal gas and using
the Amagat's law.
An insulated rigid tank is divided into two compartments by a partition. One compartment contains 7 kg of oxygen gas at 40°C and 100kPa, and the other compartment contains 4 kg of nitrogen gas at 20°C and 150kPa. Now the partition is removed, and the two gases are allowed to mix. Determine:- (a) the mixture temperature and (b) the mixture pressure after equilibrium. CvN2=0.743 kJ/kg K and CvO2 = 0.658 kJ/kg K .
Chapter 13 Solutions
Thermodynamics: An Engineering Approach
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- NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A piston–cylinder device contains 6 kg of H2 and 21 kg of N2 at 160 K and 5 MPa. Heat is now transferred to the device, and the mixture expands at constant pressure until the temperature rises to 200 K. Determine the heat transfer during this process by treating the mixture as a nonideal gas and using Amagat’s law. The universal gas constant is Ru = 8.314 kPa·m3/kmol·K. Use the table containing the molar mass, gas constant, and critical-point properties; the generalized enthalpy departure chart; and the table containing the ideal-gas properties of air.arrow_forwardA mixture of gases is assembled by first filling an evacuated 0.39-m3 tank with neon until the pressure is 35 kPa. Oxygen is added next until the pressure increases to 105 kPa. Finally, nitrogen is added until the pressure increases to 140 kPa. During each step of the tank’s filling, the contents are maintained at 60°C. Determine the mass of each constituent in the resulting mixture. The mass of neon is kg. The mass of oxygen is kg. The mass of nitrogen is kg.arrow_forwardA mixture of nitrogen and carbon dioxide has a carbon dioxide mass fraction of 50 percent. This mixture is heated at constant pressure in a closed system from 120 kPa and 30°C to 220°C. Calculate the work produced during this heating in kJ/kg. The universal gas constant is Ru= 8.314 kJ/kmol-K. Use the table containing the molar mass, gas constant, and critical-point properties. The work produced during this heating is kJ/kg.arrow_forward
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