Question

Which of the following best expresses the definition of a closed system?

Heat and matter can enter the system but cannot leave the system.

Energy can enter or leave the system but matter cannot.

Heat and matter are both able to enter or leave the system.

Matter can enter or leave the system but energy cannot.

Answer 1

@JoannaBlackwelder

Answer 2

i think that the answer is Heat and matter are both able to enter or leave the system.

Answer 3

I don't think so. http://chemistry.about.com/od/chemistryglossary/g/Closed-System-Definition.htm

Answer 4

hmm.. so you think that it is Energy can enter or leave the system but matter cannot.
?

Answer 5

Right :)

Answer 6

Thank you! :)

Answer 7

No worries