For isothermal expansion of an ideal gas into vacuum, among the following how many are zero, Pext, g,Delta T, Delta U, Delta H, Delta S, Delta G, Delta S_("surr"), Delta S_("total")

For isothermal expansion of an ideal gas into vacuum, among the follow

1.	For isothermal expansion of an ideal gas into vacuum, among the following how many are zero, Pext, g,Delta T, Delta U, Delta H, Delta S, Delta G, Delta S_("surr"), Delta S_("total")
Answer» Solution :`DELTA E = Delta H = Delta T = Q = p_("EXT") = Delta S_("SURR") = 0` `Delta S_("SYS") = Delta S_("total") + +ve, Delta G_("sys") - ve`