engineering recuitment BHEL Engineer Trainee Mock Test 2025 Thermodynamics First Law of Thermodynamics Application of First Law to Closed System
In free expansion of a ideal gas between two equilibrium states, the work transfer involved
1
can be calculated by joining the two states on p-v coordinates by any path and estimating the area below
2
can be calculated by joining the two states by a quasi-static path and then finding the area below
3
is zero
4
is equal to heat generated by friction during expansion.