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Matter In Our Surroundings
Define (i) Latent heat of fusion and (ii) Latent heat of vaporisation
Latent heat of fusion is defined as the amount of energy required to convert of solid to liquid at 1 atmospheric pressure at constant temperature.
Latent heat of vaporsiation is defined as the amount of heat energy required to convert water to gas phase at 100°C and 1 atmosheric pressure.
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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
What is the physical state of water at
0°C
What is the physical state of water at
100°C
Give two reasons to justify
Water at room temperature is a liquid.
Give two reasons to justify
An iron almirah is a solid at room temperature.
Why is ice at 273K more effective in cooling than water at the same temperature ?
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