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Can Matter Change its State Video Lecture - Class 9
FAQs on Can Matter Change its State Video Lecture - Class 9
| 1. Can matter change its state? |  |
Ans. Yes, matter can change its state. This is known as a change in the physical state or phase of matter. The three main states of matter are solid, liquid, and gas. Matter can change from one state to another through physical processes such as melting, freezing, evaporation, condensation, and sublimation.
| 2. What is melting? | |
Ans. Melting is the process in which a solid substance changes into a liquid state. This occurs when the substance absorbs enough heat energy to overcome the forces of attraction between its particles. As a result, the particles gain enough kinetic energy to break their fixed positions and start moving more freely, forming a liquid.
| 3. What is evaporation? | |
Ans. Evaporation is the process in which a liquid substance changes into a gaseous state. This occurs when the substance absorbs enough heat energy to increase the kinetic energy of its particles. As a result, the particles gain enough energy to overcome the intermolecular forces holding them together, and they escape from the liquid surface as gas.
| 4. What is condensation? | |
Ans. Condensation is the process in which a gaseous substance changes into a liquid state. This occurs when the gas loses enough heat energy to decrease the kinetic energy of its particles. As a result, the particles slow down and come closer together, forming a liquid. Condensation commonly occurs when a gas cools down or comes into contact with a colder surface.
| 5. What is sublimation? | |
Ans. Sublimation is the process in which a solid substance changes directly into a gaseous state without going through the liquid state. This occurs when the substance absorbs enough heat energy to increase the kinetic energy of its particles. As a result, the particles gain enough energy to overcome the forces of attraction within the solid, and they transform into gas.
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Dec 27, 2024 Last updated |
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