Which of the following statement(s) is/are false?

Options

A. All adiabatic processes are isoentropic (or isenthermic) processes
B. When `(DeltaG_("system"))_(TP) lt 0`, the reaction must be exothermic
C. `dG=VdP-SdT ` is applicable for closed system, both PV and non-PV work
D. the heat of vaporisation of water at `100^(@)C` is 40.6 KJ/mol . When 9 gm of water vapour condenses to liquid at `100^(@)C` of 1 atm , then `DeltaS_("system")=54.42 J//K`

Answer

A, B, C, D

Explanation

(A) Reversible adiabatic process is isoentropic
(B) Reaction is spontaneous , need not be exothermic.
(C) Only when PV work is innvoled
(D) `DeltaS_("system") =(DeltaH_("System"))/(T_(b)) =-(40600)/(373xx2) =-54.42 J//K`