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When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are...
Problem 7. (1 point) When air expands adiabatically (without gaining or losing heat), its pressure P...
Problem 7. (1 point) When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV 14 = C where C is a constant. Suppose that at a certain instant the volume is 340 cm, and the pressure is 97 kPa (kPa = kiloPascals) and is decreasing at a rate of 15 kPa/minute. At what rate is the volume increasing at this instant? The volume is increasing at cm/min Problem 5....
Boyle's law states that when a sample of gas is compressed at a constant temperature, the...
Boyle's law states that when a sample of gas is compressed at a
constant temperature, the pressure P and volume V satisfy the
equation PV=C, where C is a constant. Suppose that at a certain
instant the volume is 200 cm^3, the pressure is 80kPa and the
pressure is increasing at a rate of 30 kPa/min. At what rate is the
volume decreasing at this instant?
My No Ask Your Teacher 16. -10.12 points Scale TR 30.017 ML tai v...
The pressure P and volume V of a gas are related by the equation p^5v^7=c where c is a constant. At a certain instant of time, the pressure is 100 lb/ft^2, the volume is 4ft^3 and the pressure is dece...
The pressure P and volume V of a gas are related by the equation p^5v^7=c where c is a constant. At a certain instant of time, the pressure is 100 lb/ft^2, the volume is 4ft^3 and the pressure is decelerating at a rate of 5 lb/ft^2/sec. Find the rate of change at which the volume is changing.
Air in a piston-cylinder assembly undergoes a polytropic expansion in which the pressure – specific volume...
Air in a piston-cylinder assembly undergoes a polytropic expansion in which the pressure – specific volume relation is p. V..2=constant. The initial volume is 0.5 m², the initial temperature is 500 K and initial pressure is 600 kPa. The final pressure is 300 kPa. Determine (a) the mass of air, in kg (b) the boundary work, in kJ (c) the final temperature in K and (d) the heat transfer, in kJ.
A volume of air (assumed to be an ideal gas) is first cooled without changing its...
A volume of air (assumed to be an ideal gas) is
first cooled without changing its volume and then expanded without
changing its pressure, as shown by the path abc in the figure
(Figure 1). Take the graduation p0=2.5×105Pa and the graduation
V0=0.05.
How does the final temperature of the gas compare with its
initial temperature?
How much heat does the air exchange with its surroundings during
the process abc?
If the air instead expands from state a to state...
The pressure P and volume V of a certain amount of steam in an adiabatic process...
The pressure P and volume V of a certain amount of steam in an adiabatic process (a process in which the heat in the system does not change due to proper insulation) fairly follows the equation PVY K where y and K are constants. In an adiabatic experiment, the volume of a certain amount of steam confined in a tank is gradually increased, resulting in a decrease in gas pressure. Using the above equation and linear regression, find the values...
Process Design & Control Consider the process of filling a tank with compressed air from a constant pressure sup...
Process Design & Control
Consider the process of filling a tank with compressed
air from a constant pressure supply.
Consider the process of filling a tank with compressed air from a constant pressure supply The tank has a volume of 500 ft' and initially is at atmospheric pressure and 75°F. The tank is connected to a high pressure air line that contains a control valve. The valve is quickly opened when the filling process begins, and the flow rate of...
Hi, Really struggling to get my head around this question Could you please provide an explanation...
Hi,
Really struggling to get my head around this question Could you
please provide an explanation with your working. Trying to better
understand what's being asked. Would really appreciate it if you
could explain your working. I am happy with my answer to part a),
but can't understand where to start in part b) Many thanks!
Question 2 The ideal gas law relates the temperatueresure, and the temperature, pressure, and volume of an ideal gas. For n moles of gas,...
Thermo Final Exam open book open notes 2hrs 1. (10pts) A power plant can be described by an ideal Rankine cycle without any irreversibility's. he boiler produces superheated steam at a pressu...
Thermo Final Exam open book open notes 2hrs 1. (10pts) A power plant can be described by an ideal Rankine cycle without any irreversibility's. he boiler produces superheated steam at a pressure of 200 bars and temperature of 600c (1). The steam expands adiabatically (and isentropicly) thru a turbine exiting as a saturated vapor/liquid mixture at pressure of 0.1bar (2). The mixture passes thru a condenser (P-0.1bar) until it is all saturated liquid (3). It is then pumped adiabatically to...
A gas turbine receives air at temperature T1 = 827 °C and specific volume v, -0.1...
A gas turbine receives air at temperature T1 = 827 °C and specific volume v, -0.1 m®/kg. Air exits the turbine at P2 = 3 bar and T2 = 450 °C. The volumetric flow rate of air at the inlet is 0.5 m/s. The power output on the shaft is 1900 kW. Determine: The pressure of air at the inlet (pa) in kPa [2 marks] b) The mass flow rate in kg/s [1 mark] c) Find the rate of heat...
Problem 7. (1 point) When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV 14 = C where C is a constant. Suppose that at a certain instant the volume is 340 cm, and the pressure is 97 kPa (kPa = kiloPascals) and is decreasing at a rate of 15 kPa/minute. At what rate is the volume increasing at this instant? The volume is increasing at cm/min Problem 5....
Boyle's law states that when a sample of gas is compressed at a
constant temperature, the pressure P and volume V satisfy the
equation PV=C, where C is a constant. Suppose that at a certain
instant the volume is 200 cm^3, the pressure is 80kPa and the
pressure is increasing at a rate of 30 kPa/min. At what rate is the
volume decreasing at this instant?
My No Ask Your Teacher 16. -10.12 points Scale TR 30.017 ML tai v...
Air in a piston-cylinder assembly undergoes a polytropic expansion in which the pressure – specific volume relation is p. V..2=constant. The initial volume is 0.5 m², the initial temperature is 500 K and initial pressure is 600 kPa. The final pressure is 300 kPa. Determine (a) the mass of air, in kg (b) the boundary work, in kJ (c) the final temperature in K and (d) the heat transfer, in kJ.
A volume of air (assumed to be an ideal gas) is
first cooled without changing its volume and then expanded without
changing its pressure, as shown by the path abc in the figure
(Figure 1). Take the graduation p0=2.5×105Pa and the graduation
V0=0.05.
How does the final temperature of the gas compare with its
initial temperature?
How much heat does the air exchange with its surroundings during
the process abc?
If the air instead expands from state a to state...
The pressure P and volume V of a certain amount of steam in an adiabatic process (a process in which the heat in the system does not change due to proper insulation) fairly follows the equation PVY K where y and K are constants. In an adiabatic experiment, the volume of a certain amount of steam confined in a tank is gradually increased, resulting in a decrease in gas pressure. Using the above equation and linear regression, find the values...
Process Design & Control
Consider the process of filling a tank with compressed
air from a constant pressure supply.
Consider the process of filling a tank with compressed air from a constant pressure supply The tank has a volume of 500 ft' and initially is at atmospheric pressure and 75°F. The tank is connected to a high pressure air line that contains a control valve. The valve is quickly opened when the filling process begins, and the flow rate of...
Hi,
Really struggling to get my head around this question Could you
please provide an explanation with your working. Trying to better
understand what's being asked. Would really appreciate it if you
could explain your working. I am happy with my answer to part a),
but can't understand where to start in part b) Many thanks!
Question 2 The ideal gas law relates the temperatueresure, and the temperature, pressure, and volume of an ideal gas. For n moles of gas,...
Thermo Final Exam open book open notes 2hrs 1. (10pts) A power plant can be described by an ideal Rankine cycle without any irreversibility's. he boiler produces superheated steam at a pressure of 200 bars and temperature of 600c (1). The steam expands adiabatically (and isentropicly) thru a turbine exiting as a saturated vapor/liquid mixture at pressure of 0.1bar (2). The mixture passes thru a condenser (P-0.1bar) until it is all saturated liquid (3). It is then pumped adiabatically to...
A gas turbine receives air at temperature T1 = 827 °C and specific volume v, -0.1 m®/kg. Air exits the turbine at P2 = 3 bar and T2 = 450 °C. The volumetric flow rate of air at the inlet is 0.5 m/s. The power output on the shaft is 1900 kW. Determine: The pressure of air at the inlet (pa) in kPa [2 marks] b) The mass flow rate in kg/s [1 mark] c) Find the rate of heat...
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