Question

A given container of 5.0 kg of water maintains a constant temperature over 24 hours. If its mass doesn't change, what statements would support identifying it as a closed system.

I. Only energy was exchanged with its surroundings.
II. Its mass was constant because the water lost to evaporation was replaced with an equal volume of water.
III. It didn't exchange matter or energy with its environment.
IV. External work was used to maintain its internal energy.

A) III
B) l and III
C) II and IV
D) I and IV​

Answer 1

D) I and IV

Step-by-step explanation:

A closed system is the one where mass can not enter or leave the system, while the energy can enter o leave the system.

I. This is true according to the definition. Because only energy can enter or leave a closed system.

II. This is not true. Because mass interaction is not allowed in a closed system.

III. This is false. Because energy exchange is allowed.

IV. True. Because energy exchange is possible.

Therefore the correct option is:

D) I and IV