# liquids

## Vapor Pressure of a Mixture: Raoult's Law

Raoult's Law, which describes the vapor pressure of a mixture, is demonstrated using barometers.

## Vapor Pressure of a Mixture: Raoult's Law - Example 2

Another mixture of decane and diethyl ether is used to demonstrate Raoult's Law. Students are asked to predict the vapor pressure of the mixture.

## Vapor Pressure of a Mixture: Raoult's Law - Example 2 Ending

Another mixture of decane and diethyl ether is used to demonstrate Raoult's Law. Students are asked to predict the vapor pressure of the mixture, and the answer is shown.

## Canned Heat

Liquid ethanol is poured into a saturated calcium acetate solution and a solid gel is formed. The gel burns like canned heat (Sterno™).

## Boiling by Cooling - Demonstration

Water in a sealed flask is made to boil below its normal boiling point by cooling the water vapor in the flask.

## Boiling by Cooling - Counter Example

Cooling the liquid does not cause the water to boil.

## Drinking Bird: Introduction

Vapor pressure differential is responsible for the bobbing action of a novelty store drinking bird.

## Drinking Bird: Effect of Heat

Heating the body of a novelty store drinking bird causes it to tip over and drink.

## Drinking Bird: Effect of Water (Condensation/Cooling)

Evaporating water can cool the head of a novelty store drinking bird, causing it to tip over and drink.

## Viscosity of Liquids - Qualitative Test

The flow of four different liquids from four pipets is started simultaneously to test their viscosity.