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

@shelbygt520

Answer 2

@wolfe8

Answer 3

Well think about it. The system would be the fire in D, and fireplaces are generally opened up. So heat (energy) is being lost to the surroundings, so it can't be that. The same thing with A, excess heat is being lost to the surroundings outside of the pot. So we have it narrowed down to B and C.
For B, it is closed off. But I don't quite understand how chemical reactions could be taking place in the washing machine,
C, if I had to guess based on what I know, would be the correct answer. It is tightly closed off (with the cap) and some chemical reactions can take place inside of the liquid. In addition, pressure increases against the inside of the bottle.

Answer 4

so the answer is c?

Answer 5

@Destinymasha @iPwnBunnies @shelbygt520 @votick

Answer 6

Like I said, that's my guess based on what I know. I can't say for certain that that is the right answer.

Answer 7

okay I think its C so i guess im going with C