engineering recuitment BEL Probationary Engineers Mock Test 2025 Thermodynamics Availability and Irreversibility Available and Unavailable Energy
For a closed system undergoing a process between two specified states, the decrease in availability (or exergy) of the system is always:
1
Less than the heat transfer to the system
2
Greater than the irreversibility of the system
3
Zero, since availability is a conserved property
4
Equal to the irreversibility of the system