Calculate the change in enthalpy as 1 Kg of nitrogen is heated from 1000 K to...
Calculate the change in enthalpy as 1 Kg of nitrogen is heated
from 1000 K to 1500 K, assuming the nitrogen is an ideal gas at a
constant pressure. The temperature-dependent specific heat of
nitrogen is: Cp = 39.06 - 512.79T^-1.5 + 1072.7T^-2 - 820.4T^-3, Cp
is in kJ /kmole· K, and T is in K.
a) 600 kJ
b) 700 kJ
c) 900 kJ
d) 800 kJ
e) 1000 kJ
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Calculate the change in enthalpy as 1 Kg of nitrogen is heated
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4) An ideal-gas mixture of helium and nitrogen with a nitrogen mass fraction of 35 percent...
4) An ideal-gas mixture of helium and nitrogen with a nitrogen mass fraction of 35 percent is contained in a piston-cylinder device arranged to maintain a fixed pressure of 700 kPa. The mixture is heated from 300 K to 500 K a. Determine the molar mass and gas constant for the mixture. b. Determine the work produced, in kJ/kg. (Hint: Try finding the specific c. Determine the constant-volume and constant-pressure specific heats (Answer: 5.72 kg/kmol, 1.45 kJ/kg K) volumes at...
Participation Problem 6-4 Assuming ideal gas and constant Cp, calculate Δ S (in kJ/( from 200...
Participation Problem 6-4 Assuming ideal gas and constant Cp, calculate Δ S (in kJ/( from 200 K to 800 K while changing the pressure from 2000 kPa to 1000 kPa. kg.K)) for a process where nitrogen is heated Numeric Answer
2. (5 Points) 3-kg of air (an ideal gas) is heated in a piston-cylinder device from...
2. (5 Points) 3-kg of air (an ideal gas) is heated in a piston-cylinder device from 17°C to 117°C at a constant pressure of 100 kPa. Determine the entropy change in kJ/K, assuming: a. Constant specific heat. b. Variable specific heat.
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg...
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg K) is contained in the piston-cylinder device shown. Initially, the vol- ume is 50 cm3 and the temperature is 20°C. How much heat must be added to double the volume if the final pressure and temperature are 400 kPa and 1000 K respectively. g·K) and Cu- Ideal gas Linear spring
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What is the change of the enthalpy of 8 kg nitrogen gas when heated from 298K to 679 K?
4. 50 mol of nitrogen gas initially at 10°C and 100 bar are heated at constant...
4. 50 mol of nitrogen gas initially at 10°C and 100 bar are heated at constant pressure to a final temperature of 300°C. Using an appropriate generalized correlation calculate the amount of heat required for the process. Note that nitrogen is not an ideal gas under these conditions. Over this temperature range you may assume Cp of nitrogen to be constant equal to 30 J/mol K
Calculate the change in internal energy, change in enthalpy, work done, and the heat supplied in...
Calculate the change in internal energy, change in enthalpy, work done, and the heat supplied in the following processes: (a) An ideal gas is expanded from 5 bar to 4 bar isothermally at 600 K (b) An ideal gas contained in a vessel of 0.1 m3 capacity is initially at 1 bar and 298 K. It is heated at constant volume to 400 K. (Assume that Cp = 30 J.mol-1.K-1)
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and a 2-kW baseboard electric resistance heater in the room is turned on and kept on for 15 min. The temperature rise of air at the end of 15 min is 2)An example of when it is appropriate to model a substance as an ideal gas is when a. The pressure and temperature are close to the critcal point b. The pressure and temperature are...
1.Water vapor contained in a piston–cylinder assembly undergoes an isothermal expansion at 277°C from a pressure...
1.Water vapor contained in a piston–cylinder assembly undergoes an isothermal expansion at 277°C from a pressure of 5.1 bar to a pressure of 2.7 bar. Evaluate the work, in kJ/kg. 2.Nitrogen (N2) contained in a piston–cylinder arrangement, initially at 9.3 bar and 437 K, undergoes an expansion to a final temperature of 300 K, during which the pressure–volume relationship is pV1.1 = constant. Assuming the ideal gas model for the N2, determine the heat transfer in kJ/kg. 3.Argon contained in...
1 kg air in a piston-cylinder assembly is heated at constant pressure, resulting the expansion of...
1 kg air in a piston-cylinder assembly is heated at constant pressure, resulting the expansion of the volume. The initial temperature of the air was 300 K, and the air temperature becomes 500 K after the expansion. What is the boundary work done by the air? Assume that air is an ideal gas with constant specific heats ( 0.718 v c = kJ/kg-K and 1.005 p c = kJ/kg-K)..
4) An ideal-gas mixture of helium and nitrogen with a nitrogen mass fraction of 35 percent is contained in a piston-cylinder device arranged to maintain a fixed pressure of 700 kPa. The mixture is heated from 300 K to 500 K a. Determine the molar mass and gas constant for the mixture. b. Determine the work produced, in kJ/kg. (Hint: Try finding the specific c. Determine the constant-volume and constant-pressure specific heats (Answer: 5.72 kg/kmol, 1.45 kJ/kg K) volumes at...
Participation Problem 6-4 Assuming ideal gas and constant Cp, calculate Δ S (in kJ/( from 200 K to 800 K while changing the pressure from 2000 kPa to 1000 kPa. kg.K)) for a process where nitrogen is heated Numeric Answer
2. (5 Points) 3-kg of air (an ideal gas) is heated in a piston-cylinder device from 17°C to 117°C at a constant pressure of 100 kPa. Determine the entropy change in kJ/K, assuming: a. Constant specific heat. b. Variable specific heat.
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg K) is contained in the piston-cylinder device shown. Initially, the vol- ume is 50 cm3 and the temperature is 20°C. How much heat must be added to double the volume if the final pressure and temperature are 400 kPa and 1000 K respectively. g·K) and Cu- Ideal gas Linear spring
4. 50 mol of nitrogen gas initially at 10°C and 100 bar are heated at constant pressure to a final temperature of 300°C. Using an appropriate generalized correlation calculate the amount of heat required for the process. Note that nitrogen is not an ideal gas under these conditions. Over this temperature range you may assume Cp of nitrogen to be constant equal to 30 J/mol K
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