Advertisements
Advertisements
प्रश्न
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
उत्तर
- When we put some acetone or petrol or perfume on our palm, it evaporates.
- During evaporation, particles of the liquid absorb energy from the surrounding or the surface of the palm to compensate for the loss of energy, making the surroundings cool.
- Hence, our palm feels cold when we put some acetone or petrol or perfume on it.
APPEARS IN
संबंधित प्रश्न
Why are volatile liquids such as alcohol and spirit stored in tightly closed bottles?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Give two applications of evaporation.
Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it ? Give reasons for your answer.
Define the following term Freezing.
If the back of your hand is moistened with alcohol, you will find that it rapidly becomes dry. Why is it that while it is drying, your hand feels cool ?
The evaporation of water increases under the following conditions :
Why is the air in a region dry?
The rate of evaporation ______ with rising temperature.
When lemon juice is mixed with soda water, they produce brisk effervescence.