Question

Which of the following best expresses the definition of an open system? A. Energy can enter or leave the system but matter cannot. B. Heat and matter are both able to enter or leave the system. C. Matter can enter or leave the system but energy cannot. D. Heat and matter can enter the system but cannot leave the system..

Answer 1

"Heat and matter are both able to enter or leave the system" is the one among the following choices given in the question that best expresses the definition of an open system. The correct option among all the options that are given in the question is the second option or option "B". I hope it helps you.