21. When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as
22. A cycle consisting of two isothermal and two isentropic processes, is known as
23. Barometric pressure is equal to
24. Specific heat of air at constant pressure is equal to
25. One barometric pressure or 1 atmospheric pressure is equal to
26. The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as
27. A heat exchange process in which the product of pressure and volume remains constant is known as
28. Work done in an adiabatic process between a given pair of end states depends on
29. Steam coal is a
30. The increase in entropy of a system represents
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