When a liquid turns into a solid the molecules slow down and begin to vibrate in place. To cause freezing energy must be removed. Because you are removing heat to freeze a substance it is called a exothermic change. The point at which this happens is called the freezing point.

Evaporation happens when a liquid turns into a gas. When liquid water reaches a low enough temperature, it freezes and becomes a solid—ice. When solid water is exposed to enough heat, it will melt and return to a liquid. As that liquid water is further heated, it evaporates and becomes a gas—water vapor.

Examples of Gas to Solid (Deposition) Under certain circumstances, gas can transform directly into a solid. This process is called deposition. Water vapor to ice – Water vapor transforms directly into ice without becoming a liquid, a process that often occurs on windows during the winter months.

If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance. The example we will use here is ice melting into water. The heat is used to break the bonds between the ice molecules as they turn into a liquid phase.

Condensation is when a gas becomes a liquid. It happens when a gas, like water vapor, cools down. Evaporation and condensation happen when these molecules gain or lose energy. This energy exists in the form of heat.

Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.

Answer : Camphor in air. Option ( a ) is correct.

Hydrogen is a gas at STP and platinum is solid. Hence, Hydrogen gas adsorbed on the surface of platinum is an example of gas in solid solution.

Air itself is an example of a gas-gas solution, where other gases are “dissolved” in nitrogen. But liquids and solids can not be dissolved in gas to form a true solution, instead they form colloids.

Homogeneous solutions

Gas – Liquid Solution For example – Solution (mixture) of oxygen in water, mixture of carbon dioxide in water. Coca cola, a beverage, is an example of gas – liquid solution, as it has carbon dioxide dissolved in water.

Examples of gases include:

• Air.
• Natural gas.
• Hydrogen.
• Carbon dioxide.
• Water vapor.
• Freon.
• Ozone.
• Nitrogen.

Those elements that exist in a gaseous state under 1 atmospheric pressure are called gases. Those 11 gases are Helium, Argon, Neon, Krypton, Radon, Xenon, Nitrogen, Hydrogen, Chlorine, Fluorine, and Oxygen.

The easy answer is to lower the surrounding temperature. When the temperature drops, energy will be transferred out of your gas atoms into the colder environment. When you reach the temperature of the condensation point, you become a liquid.

Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.

Answer: The easy answer is to lower the surrounding temperature. When the temperature drops, energy will be transferred out of your gas atoms into the colder environment. When you reach the temperature of the condensation point, you become a liquid.

Evaporation is defined as the process of a liquid changing into a gas. An example of evaporation is water turning into steam. Evaporation takes place at the surface of a liquid, where molecules with the highest kinetic energy are able to escape.

Let’s read further to know about the everyday life examples of evaporation.

• Drying Clothes under The Sun.
• Ironing of Clothes.
• Melting of Ice Cubes.
• Preparation of Common Salt.
• Evaporation of Nail Paint Remover.
• Drying of Wet Hair.
• Drying up of Different Water Bodies.
• Evaporation of Sweat from Body.

Evaporation, the process by which an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils; in particular, the process by which liquid water enters the atmosphere as water vapour.

Boiling is similar to evaporation because both processes turn a liquid into a gas. Because of the pressure difference, gas bubbles from all through the liquid are able to rise up and escape as vapor.

Evaporation commonly occurs in everyday life. When you get out of the shower, the water on your body evaporates as you dry. If you leave a glass of water out, the water level will slowly decrease as the water evaporates. One important example of evaporation is sweating.

Common examples of condensation are: dew forming on grass in the early morning, eye glasses fogging up when you enter a warm building on a cold winter day, or water drops forming on a glass holding a cold drink on a hot summer day. Condensation occurs when water droplets form due to cooling air.

Condensation is the change from a vapor to a condensed state (solid or liquid). Evaporation is the change of a liquid to a gas.

Lesson Summary Next, it moves through evaporation, or the process by which water is converted from its liquid state to a gaseous state called water vapor. This is followed by condensation, which is the process by which water vapor is changed back into liquid water.

Evaporation is a very important part of the water cycle. Once water evaporates, it also helps form clouds. The clouds then release the moisture as rain or snow. Condensation is crucial to the water cycle because it is responsible for the formation of clouds.

The water cycle relies on the processes of evaporation and condensation.

• Evaporation.
• Adding energy (heating) increases the rate of evaporation.
• Condensation.
• Removing energy (cooling) increases the rate of condensation.
• Evaporation and Condensation Happen at the Same Time.
• Other factors affect evaporation and condensation.

Visible and Concealed Condensation Two things must be present for condensation to occur: warm moist air, and cool surface temperatures below the dew point. The proper control of these two factors can minimize condensation.

After condensation the water vapour or the moisture in the atmosphere takes one of the following forms — dew, frost, fog and clouds.

They include:

• temperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.
• exposed surface area of the liquid.
• presence or absence of other substances in the liquid.
• air movement.
• concentration of the evaporating substance in the air.