heat or hotness

[Den_Vorona]

Dear teacher!
I don`t know whether can I use hotness or not? Could you help me?

A burner at the bottom of the balloon provides the heat / hotness.

What answer is correct? I think "hotness", but...

 

[SoothingDave]

Heat.

 

[beascarpetta]

I'm afraid the correct answer is heat.

As far as I can see , hotness is an expression used with algorithms.

 

[abaka]

Thermodynamic transferable energy is heat.

Human passion is heat.

Human attractiveness is hotness, but sometimes heat as well.

 

[billmcd]

Thermodynamic transferable energy is heat.

Human passion is heat.

Human attractiveness is hotness, but sometimes heat as well. Yes, and may address her as, Your Hotness.

b.