## What is a cooling curve experiment?

A cooling curve of a substance is a graph of the variation of the temperature with time as it is allowed to cool. The gradient of the cooling curve is related to the heat capacity, the thermal conductivity of the substance, and the external temperature.

### What is the aim of a heating and cooling curve?

We can draw heating and cooling curves for any substance. A heating curve of a substance gives the changes in temperature as we move from a solid to a liquid to a gas. A cooling curve gives the changes in temperature as we move from gas to liquid to solid.

**Why does a cooling curve flatten out?**

The temperature decreases at a uniform rate as the water cools to the freezing point, but the curve flattens out at the freezing point when the liquid water freezes to solid ice.

**What is the difference from a cooling curve and a heating 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. Just like heating curves, cooling curves have horizontal flat parts where the state changes from gas to liquid, or from liquid to solid.

## What is the difference between heating curve and cooling curve?

### How to investigate the heating and cooling curve of water?

To investigate the heating and cooling curve of water. Place some ice in a beaker. Measure the temperature of the ice and record it. After 1 minute measure the temperature again and record it. Repeat every minute, until at least 3 minutes after the ice has melted.

**Which is the slope of the AB heating curve?**

AB Heating ice from -15°C to 0°C is represented by the sloping line segment AB Converting the ice at 0°C to water at 0°C is the horizontal segment BC. Additional heat increases the temperature of the water until the temperature reaches 100°C during segment CD.

**What do you call a graph of a heating curve?**

You observed a phase change process for ice (solid water) being melted, heated and then boiled in class. A graph of the temperature of the system versus the amount of heat added (or temp vs time if the heat is added at a constant rate) is called a heating curve.

## How to calculate plateau segments of heating and cooling curves?

Energy Calculations for the Plateau Segments of the Heating (or Cooling) Curve ∆Hfusion and ∆Hvaporization – available on the bottom of the lemon yellow sheet In segments BC and DE we are converting one phase to another at a constant temperature.