Podcast
Questions and Answers
Which process involves the direct change of gas to solid without going through the liquid state?
Which process involves the direct change of gas to solid without going through the liquid state?
What is the term used for a change of state directly from solid to gas without going through the liquid state?
What is the term used for a change of state directly from solid to gas without going through the liquid state?
What happens when solid carbon dioxide (CO2) decreases in pressure to 1 atmosphere?
What happens when solid carbon dioxide (CO2) decreases in pressure to 1 atmosphere?
Which factor determines the state of a substance as solid, liquid, or gas?
Which factor determines the state of a substance as solid, liquid, or gas?
Signup and view all the answers
What term is used for the process of applying pressure to a gas to liquefy it?
What term is used for the process of applying pressure to a gas to liquefy it?
Signup and view all the answers
Which term refers to the conversion of a solid directly into a gaseous state?
Which term refers to the conversion of a solid directly into a gaseous state?
Signup and view all the answers
Study Notes
States of Matter
- Particles from the bulk of a liquid gain enough energy to change into the vapour state, with a temperature of 373 K (100°C) for water.
Latent Heat of Vaporisation
- Latent heat of vaporisation is the heat energy required to change 1 kg of a liquid to gas at atmospheric pressure at its boiling point.
- It is the energy absorbed by particles in steam to change from liquid to vapour state.
Boiling and Evaporation
- Boiling is a bulk phenomenon where particles from the bulk of the liquid change into vapour state.
- Evaporation is a surface phenomenon where particles from the surface gain enough energy to change into vapour state.
- Evaporation causes cooling and its rate depends on surface area, temperature, humidity, and wind speed.
Temperature Conversion
- 0°C = 273 K, and to convert Celsius to Kelvin, add 273 to the Celsius temperature.
- To convert Kelvin to Celsius, subtract 273 from the Kelvin temperature.
Sublimation and Deposition
- Sublimation is a change of state directly from solid to gas without changing into liquid state.
- Deposition is a change of state directly from gaseous state to solid state without going through liquid state.
- Examples of sublimation and deposition include camphor and solid carbon dioxide (dry ice).
Effect of Change of Pressure
- Applying pressure and reducing temperature can liquefy gases.
- Pressure and temperature determine the state of a substance, whether it will be solid, liquid, or gas.
- Decreasing pressure can change a solid directly into a gas, as seen in solid carbon dioxide (dry ice).
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Learn about the concept of latent heat of vaporisation using water as an example. Understand how particles in steam have absorbed extra energy to change into the vapour state, and why steam has more energy than water at the same temperature.
