A closed system receives 60 kJ heat but its internal energy decreases by 30 kJ, Then the work done by the system is
If the work done on a closed system is 20 kJ/kg, and 40 kJ/kg heat is rejected from the system, its internal energy decreases by
As per first law of thermodynamics:
The integrating factor of quasi-static displacement work is
An inexact different dW when multiplied by an integrating factor 1/P becomes an exact differential dV.
(Point function) = (Integrating factor) x (Path function)
The integrating factor of reversible heat transfer is
Heat transferred to a closed stationary system at constant volume is equal to
Which among the following is not a boundary phenomenon?
In a general compression process, 2 kJ of mechanical work is supplied to 4 kg of fluid and 800 J of heat is rejected to the cooling jacket. The change in specific internal energy would be
Which among the following is not true?
The following data refer to a 6-cylinder, single- acting, two-stroke diesel engine:
Cylinder diameter - 0.7 m
Stroke of a piston - 1.2 m
Area of indicator diagram - 5.5 x 10-4 m2
Length of diagram - 0.06 m
Spring value -144 MPa per m
What is the net rate of work transfer from the gas to the pistons in kW?
Net work transfer,
A piston-cylinder device with air at an initial temperature of 289C undergoes an expansion process for which pressure and volume are related as given below:
What is the work done by the system?