two properties that liquids have in common with solids
can exert pressure on the walls of the container. Assign reason
Explain why temperature remain constant during the change of state
substance?
9. Deline Sublimation with example
10. Convert the following temperature to the Kelvin scale (a) 25°C (b
11. What will happen to the melting point temperature of ice if some
added to it? Justify your answer.
12Liquids generally have lower density as compared to solids.
observed that ice floats on water. Why?
) What is the physical state of water at 250°C.0°C?
13. What are intermolecular forces? How are these related to the
14. What is meant by evaporation? State the effect of (i) surface
the rate of evaporation
5. Alka was making tea in a kettle. Suddenly she felt intense he
lennie She wondered whether the
Answers
Answer:
liquid have no definite shape and volume and have maximum mass then gas. 13. it is a evaporated or gaseous state 10. 275_25 . 12. liquid have low density . but ice is floating because it is a solid state . evaporation is a process to evaporate the water due to temperature
Explanation:
1)sublimation is a process in which a solid substance directly concerts into gas state.without the intermediate liquid state.
2) 25 degrees + 273.15 =temperature in kelvin scale. ;298.15 degrees.
3) when ice is added to some substance its melting point increases because ice absorbs more and more latent heat.
4) density is nothing but mass person unit volume so in solids the particles arrangement closely so in less volume more particles accumulates.
5) intermolecular forces are the forces of attraction between two molecules .
may be hydrogen bonds ....
6)evaporation is process of conversion of liquid to gaseous state. when surface increases more evaporation takes place.
hope u understood my explanation....
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