Question

An unknown substance is cooled from 25 °C to 10 °C. The table below shows the state of the substance at different temperatures.


Picture will be attached


Which statement is correct about the unknown substance?
Its freezing point is 23 °C.
Its freezing point is 18 °C.
The substance sublimes at 23 °C.
The substance exists as a gas at 18 °C

Answer 1

Am I right with B?

Answer 2

@kittybasil @AZ

Answer 3

LANDFALL!!
Hmm, let me see

Answer 4

Well first of all, I don't think "sublimes" has any place in this. So you can take C out

Answer 5

Okay

Answer 6

Yeah, your answer is correct

Answer 7

But to sum things up, yes you're right because the temp stays at 18 degrees prior to complete solidification

Answer 8

So it's in the process of freezing during those 3 stages that the temp is 18 degrees

Answer 9

Okay thank you

Answer 10

Yeah im taking notes rn aswell

Answer 11

That's great to hear! :-)