A gas is allowed to expand under reversible adiabatic conditions what is zero for such a process:
For the process to occur under adiabatic conditions, the correct condition is: (i) Δ T=0 (ii) Δ p=0 (iii) q = 0 (iv) w = 0
For the process H2O(l)(1bar,373K) → H2O(g) (1bar,373K), the correct set of thermodynamic parameters is