Heating Curve Intro

Heating Curve Intro

Main ideas:

• There is MORE happening in a pot of water boiling than we can see or imagine

• We need to be able to describe the wild and weird world of molecules trying to evaporate

Multiple Choice

Quick Review: Which phase change is from solid to liquid?

• freezing

• melting

• condensation

• boiling

Multiple Choice

Quick Review: Which phase change is from gas to liquid?

• freezing

• melting

• condensation

• boiling

Multiple Choice

Which state of matter is represented here?

• solid

• liquid

• gas

Open Ended

LOW RISK QUESTION. I just want to see what you are thinking:

What would it take for one of these particles to become a gas?

NOTES TO WRITE

Intermolecular forces (IMF) = Attractions between particles.

To change phases those forces need to be formed or broken.

Heating Curve

• Sketch this graph!

• Let's label it.

Multiple Choice

Which part of the heating curve is the point when the substance is gaining kinetic energy?

• A

• B

Multiple Choice

Which part of the heating curve is the point when the substance is changing phases?

• C

• D

Multiple Choice

Which part of the heating curve is the point when attractions are being broken?

• D

• E

Real Life is Messy

Heating curves in real life are never as clean as the one we just studied. You have to search for the flat points.

You will need to do this in the Exit Ticket!

Multiple Choice

Substance A melts at 40C.

Substance B melts at 60C. 
Which substance has stronger intermolecular forces? 

• A

• B

Poll

Are you going to understand this by the end of the week?

• I already get it!

• Yeah, give me a week and I will get it all.

• I hope so... but I am not sure

• I have very little hope, I a lost