The Student Room Group

Hi

So there is this graph that shows how the temperature of a pure substance changes as it cools from 330 degrees celsius
Explain why the temperature of the substance is constant between marked points J and K
Pls help
Reply 1
Avatar for Pigster
Pigster
20
At point J, the substance starts to condense/freeze, the heat energy you are removing comes from the energy released by condensation/freezing. At point K, all of the gas/liquid has condensed/frozen, so removing more heat will decrease the temperature, once again.

What are points J and K anyway?
Reply 2
Avatar for bsq_294
bsq_294
OP
image.jpg
Original post by Pigster
At point J, the substance starts to condense/freeze, the heat energy you are removing comes from the energy released by condensation/freezing. At point K, all of the gas/liquid has condensed/frozen, so removing more heat will decrease the temperature, once again.

What are points J and K anyway?


That is the question so they are asking why the temperature is constant. Pls tell I'm so confused what to write
Reply 3
Avatar for bsq_294
bsq_294
OP
I need the answer to a question 😂
Reply 4
Avatar for Pigster
Pigster
20
When a substance freezes, energy is released, which keeps the temperature from falling.

w00t.

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