In an adiabatic change:
the change takes place slowly and the system is in good thermal contact with the surroundings
the change takes place quickly and the system is in good thermal contact with the surroundings
the change takes place slowly and the system is thermally insulated from the surroundings
the change takes place quickly and the system is thermally insulated from the surroundings
In adiabatic process there is no exchange of heat between the system and its surroundings and it takes place quickly .