If Δ=∣∣ ∣∣a00bcacab∣∣ ∣∣ then ∣∣ ∣ ∣∣p2a00pbcapcab∣∣ ∣ ∣∣ is equal to
Under which of the following conditions is the relation, Δ H = Δ U + PΔ V valid for a closed system?