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Answer:
9. Gases have a negligible intermolecular force of attraction between the particles of gas. The random motion of particles in all the directions is experience in the vessel. Hence, the gas fills completely the vessel in which it is kept.
10. As the wooden table acquires all the characteristics of a solid (that is fixed shape, volume, rigidity, strong force of attraction, least intermolecular space) hence the wooden table should be called solid.
11. It possesses the additional latent heat of vaporization. So, when steam falls on skin and condenses to produce water it gives out 22.5 x 105 J/kg more heat than boiling water at the same temperature. Therefore, burns produced by steam are more severe than those produced by boiling water.
12. Sponge is a solid state of matter yet it is compressible in nature. This is because of space/Interparticle space between the particles of sponge. So, the sponge can be compressed. Yet it is solid in nature because there is a force of attraction between the particles of sponge.
13. a)500C=(500+273)K=773K
b)200K=(200-273)C= -73°c
14. Any gas can be liquefied when the gas has been exposed to the high pressures and low temperatures. The pressure that has to be applied as well as the temperature depends on the molecular forces of the gas molecules.
15. Evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. While putting clothes for drying up, we spread them out, because, more area is exposed to sun and wind which speeds up the rate of evaporation.
Answer:
- 200k= -73.15 c
Explanation:
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