Question

The boiling point of the crystalline mass is
50 degrees Celsius.
200 degrees Celsius.
300 degrees Celsius.
400 degrees Celsius.

Answer 1

Well, the graph usually levels out at each phase so at 50 C it's probably at a liquid state, then at 200 it starts to change to a gas also known as the boiling point. So, 200?

Answer 2

Okay, that makes sense. Thank you so much.(:

Answer 3

No problem.

Answer 4

You may also want to review this:

http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/phase.html