From first law, ∆U=q+W For adiabatic process, q=0 ∆U=W
Work is path function. Consider the pV curve shown below. To reach from initial state 1 to final state 2 , the area under the curve when path A is taken is more than the area under the curve when path B is taken. So, work done is more when path A is adopted. An extensive property is a property that depends on the amount of matter in a sample. Mass and volume are examples of extensive properties. Hence, statement I, II and III are correct.
