Advertisements
Advertisements
प्रश्न
Why is heat energy needed to melt a solid ? What is this heat energy called ?
उत्तर
Heat energy is needed to melt a solid because heat energy increases the kinetic energy of particles, which is sufficient enough to break the attraction or bond between the particles and they start moving faster. As a result, there is a change in the state of matter from solid to liquid.
This heat energy is called latent heat of fusion.
APPEARS IN
संबंधित प्रश्न
Wet clothes dry more quickly on a warm dry day than on a cold humid day. Explain.
Explain why in hot summer days water remains cool in earthen pots.
What type of clothes should we wear in summer ? Why ?
How can the evaporation of a liquid be made faster ?
The evaporation of water increases under the following conditions :
The ______ of air is dependent on the temperature of air.
How does the water kept in an earthen pot remain cool?
Comment on the following statements:
Rate of evaporation of an aqueous solution decreases with increase in humidity.
The rate of evaporation ______ with rising temperature.
The process of evaporation is not a good technic to separate salt from seawater give a reason.
