A system is taken from state “P” to state “Q” along two different paths “a” and “b”. The heat absorbed and work done by the system along these paths are “Qa”, “Qb” and “Wa”, “Wb” respectively. Which among the following will be true?
1
Wa + Qa = Wb + Qb
2
Qa = Ab
3
Wa = Wb
4
Qa - Wa = Qb – Wb