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Matter In Our Surroundings
Why does evaporation causes cooling of a liquid system
Due to evaporation, only high energy particles leave the surface. This results in decrease of average kinetic energy of the particles in the system. Kinetic energy is related to temperature. As a result there is a drop in temperature of the liquid. Thus evaporation causes cooling.
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Convert the following temperature to Celsius scale.
300K
Convert the following temperature to Celsius scale.
573 K
Convert the following temperatures to Kelvin scale
25°C
What is the physical state of water at
100 °C
For any substance, why does the temperature remain constant during the change of state ?
Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
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