## Heating Curves vs. Cooling Curves

Sonia Perez 1G
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

### Heating Curves vs. Cooling Curves

How does a cooling curve differ from a heating curve?

Katherine Ho 1E
Posts: 18
Joined: Fri Sep 25, 2015 3:00 am

### Re: Heating Curves vs. Cooling Curves

They're pretty much the same idea showing the different phases of something at certain temperatures over time.

For example, let's take water/ice.

We denote the temperature of water on the vertical axis and the amount of heat added over time on the horizontal axis.
If we want to diagram the phases of ice (solid) turning into water (liquid) and eventually steam (gas), the starting temperature would be 0 degrees (or lower) and the curve would be positive/increasing as more heat is added (as the temperature rises). This becomes a heating curve diagram.

Vice versa, if we wanted to see the phase changes of water becoming ice, the temperature would start at a higher point and we would see the curve decrease over time. This would be your cooling curve diagram.

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