Solve this worksheet if you can. I challenge you all.
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1. Yes, a sponge is solid because it changes its shape only when an external force is applied.It has small pores filled with air in it which allows it to be compressed.
2.The temperature at which a solid melt at atmospheric pressure is called its melting point
3. The amount of heat required for 1kg of a liquid to get converted into vapor at atmospheric pressure at its boiling point is called latent heat of vaporization
4. Evaporation is a surface phenomenon whereas boiling is a bulk phenomenon
Evaporation occurs at any temperature below boiling point whereas boiling occurs only at the boiling point.
Evaporation is a slow process whereas boiling occurs quickly
5.a) 0K b)173K c)303K
6) Yes, the temperature of the steam is more than boiling water. This is because it has more heat energy in the form of latent heat. In simple words, steam has more heat energy because it has already overcome the process of vaporization which requires the liquid to absorb heat from surrounding whereas the boiling water has less latent heat.
7) It would be option D because the ice first absorbs the heat for overcoming the intermolecular force of attraction and then slowly the it melts and that is when the temperature actually increases.
8) I would spread it wide and let it dry under the sun, place it under the ceiling fan.
9) The temperature of a substance remains the same during melting or boiling point because the heat provided is used by the object to overcome the intermolecular forces of attraction and then conversion in its state of matter.
10)More surface area = more exposure of liquid= more evaporation
More wind leads to faster evaporation because the vapour in the air is carried away by the wind leading to less humidity.
THAT'S ALL, HOPE IT HELPS :)
2.The temperature at which a solid melt at atmospheric pressure is called its melting point
3. The amount of heat required for 1kg of a liquid to get converted into vapor at atmospheric pressure at its boiling point is called latent heat of vaporization
4. Evaporation is a surface phenomenon whereas boiling is a bulk phenomenon
Evaporation occurs at any temperature below boiling point whereas boiling occurs only at the boiling point.
Evaporation is a slow process whereas boiling occurs quickly
5.a) 0K b)173K c)303K
6) Yes, the temperature of the steam is more than boiling water. This is because it has more heat energy in the form of latent heat. In simple words, steam has more heat energy because it has already overcome the process of vaporization which requires the liquid to absorb heat from surrounding whereas the boiling water has less latent heat.
7) It would be option D because the ice first absorbs the heat for overcoming the intermolecular force of attraction and then slowly the it melts and that is when the temperature actually increases.
8) I would spread it wide and let it dry under the sun, place it under the ceiling fan.
9) The temperature of a substance remains the same during melting or boiling point because the heat provided is used by the object to overcome the intermolecular forces of attraction and then conversion in its state of matter.
10)More surface area = more exposure of liquid= more evaporation
More wind leads to faster evaporation because the vapour in the air is carried away by the wind leading to less humidity.
THAT'S ALL, HOPE IT HELPS :)
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