Question

No system is completely closed off from its surroundings. Which represents a system that is almost completely closed?

A.
a pot of boiling water


B.
a washing machine


C.
a capped soda bottle


D.
a wood-burning fireplace

Answer 1

I'd say C. since unless its opened by someone, it would be temporarily closed off.

Step-by-step explanation:

Answer 2

I think the correct answer from the choices listed above is option A. It would be a pot of boiling water that represents a system that is almost completely closed since there is no mass flow and there is a very minimal heat transfer. Hope this answers the question.