A gas is compressed from V1 = 0.3 m3, p1 = 1 bar to V2 =...
A gas is compressed from V1 = 0.3 m3, p1 = 1 bar to V2 = 0.1 m3, p2 = 1.9 bar. Pressure and volume are related linearly during the process. For the gas, find the work, in kJ.
Homework Answers
Situation 1: A gas expands at constant pressure P1 from volume V1 to volume V2. It...
Situation 1: A gas expands at constant pressure P1 from volume V1 to volume V2. It is then kept at constant volume while the pressure is reduced to P2. Situation 2: A gas is reduced in pressure from P1 to P2 while its volume is held constant at V1. It is then expanded at constant pressure P2 to a final volume V2. In which of the processes is more work done by the gas? Why?
A sample of gas expands from V1 = 1.1 m3 and p1 = 46 Pa to...
A sample of gas expands from V1 = 1.1
m3 and p1 = 46 Pa to
V2 = 4.8 m3 and
p2 = 18 Pa along path B in the
p-V diagram in the figure below. It is then compressed
back to V1 along either path A or path
C. Compute the net work done by the gas for the complete
cycle along (a) path BA and
(b) path BC.
0
If a gas is compressed isentropically such that: P1 = initial pressure in Pa P2 =...
If a gas is compressed isentropically such that: P1 = initial pressure in Pa P2 = final pressure in Pa V1 = initial volume in m3 V2 = final volume in m3 T1 = initial temperature in K T2 = final temperature in K, then prove the following relationship: ?1?−1?1 = ?2?−1?2
4. A mass of 5 kg undergoes a process during which there is heat transfer from...
4. A mass of 5 kg undergoes a process during which there is heat transfer from the mass at a rate of 6 kJ per kg, an elevation decrease of 34 m, and an increase in velocity from 13 m/s to 34 m/s. The specific internal energy decreases by 6 kJ/kg and the acceleration of gravity is constant at 9.7 m/s2. Determine the work for the process, in kJ. 5. A gas is compressed in a piston–cylinder assembly from p1...
An ideal monatomic gas goes from P1 = 140 atm and V1 = 55 m3 to...
An ideal monatomic gas goes from P1 = 140 atm and V1 = 55 m3 to P2 and V2 via an adiabatic process. If P2 = 60 atm, what is V2 in m3?
An ideal monatomic gas goes from P1 = 150 atm and V1 = 25 m3 to...
An ideal monatomic gas goes from P1 = 150 atm and V1 = 25 m3 to P2 and V2 via an adiabatic process. If P2 = 40 atm, what is V2 in m3?
A gas contained within a piston-cylinder assembly undergoes two processes
A gas contained within a piston-cylinder assembly undergoes two processes, A and B, between the same end states, 1 and 2, where p1=10 bar, V1= 0.1 m3, U1=400 kJ and p2=1 bar, V2=1.0 m3, U2=200 kJ: Process A. Process from 1 to 2 during which the pressure-volume relation is p.V = constant. Process B: Constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to state 2 Kinetic and potential energy effects can be ignored. For...
P1= 5 bars, P2 = ?, V1 = .3 m^3 , V2 = .7 m^3, Cv...
P1=
5 bars, P2 = ?, V1 = .3 m^3 , V2 = .7 m^3, Cv = .5 KJ/kgK, dv = 2.5
KJ/kg
*du
= 2.5 KJ/ Kg
PART B(1) A gas mixture expands with a known pressure-volume relation, PVConst. The gas mixture behaves as an ideal gas. The process is polytropic with n=1.3. Kinetic and Potential energy effects are or (plv1)in(v2/v1), dU=mCvdT, 1 bar-10 N/sq.m, 1 kJ-10 N.m, Universal gas constant(R)- 8.314 kJ/(kmol.K)= MR, Please refer to the given...
3.A cylinder contains 0.085 m3 of gas at 1.032 bar and 38°C. The gas is compressed...
3.A cylinder contains 0.085 m3 of gas at 1.032 bar and 38°C. The gas is compressed according to the law PVi3 - constant until the pressure is 5.5 bar. Determine the heat energy supplied or rejected during the process. For the gas take cv 0.715 kJ/kgK and R 0.287 kJ/kgK.
A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3,...
A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3, 1 bar to a final state of 0.034 m3, 3.9 bar. The specific heat at constant volume is 0.724 kJ/kg×K, and the specific heat at constant pressure is 1.020 kJ/kg×K. The observed temperature rise is 146K. Calculate the specific gas constant, R, the mass of gas present, and the internal energy of the gas.
A sample of gas expands from V1 = 1.1
m3 and p1 = 46 Pa to
V2 = 4.8 m3 and
p2 = 18 Pa along path B in the
p-V diagram in the figure below. It is then compressed
back to V1 along either path A or path
C. Compute the net work done by the gas for the complete
cycle along (a) path BA and
(b) path BC.
0
P1=
5 bars, P2 = ?, V1 = .3 m^3 , V2 = .7 m^3, Cv = .5 KJ/kgK, dv = 2.5
KJ/kg
*du
= 2.5 KJ/ Kg
PART B(1) A gas mixture expands with a known pressure-volume relation, PVConst. The gas mixture behaves as an ideal gas. The process is polytropic with n=1.3. Kinetic and Potential energy effects are or (plv1)in(v2/v1), dU=mCvdT, 1 bar-10 N/sq.m, 1 kJ-10 N.m, Universal gas constant(R)- 8.314 kJ/(kmol.K)= MR, Please refer to the given...
3.A cylinder contains 0.085 m3 of gas at 1.032 bar and 38°C. The gas is compressed according to the law PVi3 - constant until the pressure is 5.5 bar. Determine the heat energy supplied or rejected during the process. For the gas take cv 0.715 kJ/kgK and R 0.287 kJ/kgK.
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