How fast do particles move in a liquid

As the temperature increases the rate of evaporation increases. Evaporation is also assisted by windy conditions which help to remove the vapour particles from the liquid so that more escape.

Evaporation is a complex idea for children for a number of reasons. The process involves the apparent disappearance of a liquid which makes the process difficult for them to understand. It is not easy to see the water particles in the air. Also, evaporation occurs in a number of quite differing situations - such as from a puddle or bowl of water where the amount of liquid obviously changes, to situations where the liquid is less obvious - such as clothes drying or even those where there is no obvious liquid at all to start with - such as bread drying out.

A further complication is that evaporation may be of a solvent from a solution e. These situations are quite different yet all involve evaporation. Evaporation may also involve liquids other than water e. The particle model can be used to explain how it is possible to detect smells some distance away from the source. If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapour as it gets warmer.

Liquids evaporate faster as they heat up and more particles have enough energy to break away. The particles need energy to overcome the attractions between them. As the liquid gets warmer more particles have sufficient energy to escape from the liquid.

Eventually even particles in the middle of the liquid form bubbles of gas in the liquid. At this point the liquid is boiling and turning to gas. The particles in the gas are the same as they were in the liquid they just have more energy. At normal atmospheric pressure all materials have a specific temperature at which boiling occurs. They are free to form droplets and puddles when they are not inside a container.

When a liquid is inside a container, it will take its shape. Unlike gases, a liquid will not change its volume to spread out and completely fill a container. What is the shape of liquid?

In a liquid, the particles are still in close contact, so liquids have a definite volume. However, because the particles can move about each other rather freely, a liquid has no definite shape and takes a shape dictated by its container. Why do lighter gas molecules move faster? The volume of the gas does not depend on the size of the molecules that make it up.

Since all gases have the same average kinetic energy at the same temperature, lighter molecules move faster and heavier molecules move slower on average. Which is an example of a gas diffusion? You can smell perfume because it diffuses into the air and makes its way into your nose. A teabag placed in a cup of hot water will diffuse into the water. Placing food coloring in a liquid will diffuse the color. These are some common examples of diffusion of gases.

What is the mean of diffusion? Diffusion is the movement of a fluid from an area of higher concentration to an area of lower concentration. Diffusion may also be thought of as the movement of particles down a concentration gradient.

The term "diffusion" comes from the Latin word diffundere, which means "to spread out. What happens with diffusion in gases? Diffusion in gases They eventually spread through the whole room from an area of high concentration to an area of low concentration.

Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster. In which state of matter diffusion is fastest? The particles in a liquid usually are still touching but there are some spaces between them.

The gas particles have big distances between them. Solid — In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other. Their vibration is related to their kinetic energy. In the solid the particles vibrate in place.

Liquid — In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container. The attractive forces between particles are strong enough to hold a specific volume but not strong enough to keep the molecules sliding over each other.