A cooling curve of a substance is a graph of the variation of the temperature with time as it is allowed to cool. ... The lines are curved because as the substance cools, the temperature difference between the surroundings and the substance is reduced.
How do you read a cooling curve?
https://www.youtube.com/watch?v=n88R4paxy_Q
How do you read a heat graph?
https://www.youtube.com/watch?v=6atX_K19css
What does a heating curve tell us?
A heating curve shows how the temperature changes as a substance is heated up at a constant rate.
What does a cooling curve show?
Cooling curves are the opposite. They show how the temperature changes as a substance is cooled down. Just like heating curves, cooling curves have horizontal flat parts where the state changes from gas to liquid, or from liquid to solid.
How do you know if a heating curve is endothermic or exothermic?
On any heating curve, energy is added and therefore it is always endothermic. ... On any cooling curve, energy is released and therefore it is always exothermic.
What is the difference between a heating and cooling curve?
Heating curves show how the temperature changes as a substance is heated up. Cooling curves are the opposite. They show how the temperature changes as a substance is cooled down.
Is supercooling endothermic or exothermic?
When a crystal is added to the supercooled liquid, the temperature rapidly rises as solidification takes place, confirming this process is exothermic.
Is heating exothermic?
endothermic: Heat is absorbed by the system from the surroundings. exothermic: Heat is released by the system into the surroundings.