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JSSC JE (ME) :QUIZ-22 || First Law of Thermodynamics
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Question 1
Which of the following represents the perpetual motion of the first kind
Question 2
A closed gaseous system undergoes a reversible constant pressure process at 2 bar in which 100 kJ of heat is rejected and the volume changes from 0.2 m3 to 0.1 m3. The change in the internal energy of the system is
Question 3
When the heat transfer into a system is Greater than the work transfer out of the system, then
Question 4
A closed system of constant volume experiences a temperature rise of 50°C when a certain process occurs. The heat transferred within the method is 100 kJ. The specific heat at constant volume for the pure substance comprising the system is 1 kJ/kg °C, and the system contains 3 kg of this substance. Work done in this case is:
Question 5
Thermodynamic work is the product of _________.
Question 6
A closed system rejects 80 kJ heat and work done by the system is 80 kJ. The change in internal energy will be:
Question 7
A compressed gas from a container is used to inflate an inelastic flexible ballon originally folded completely flat to a volume of 0.8m3. If the barometer reads 760mm Hg, what is the amount of work done(in kJ) upon the atmosphere by the balloon?
Question 8
A mass m of a perfect gas at pressure p1 and volume V1 undergoes an isothermal process. The final pressure is p2 and volume is V2. The work done on the system is considered positive. If R is the gas constant and T is the temperature, then the work done in the process is
Question 9
The value of specific heat for polytropic process will be (1<n<γ) _________.
Question 10
For an adiabatic process, relation between open system work and close system work is given by
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