Question

Give reasons :

i) A sponge can be pressed easily; still it is called a solid.

ii) Water vapours have more energy than water at same temperature.​

Answer 1

Answer:

i) Sponge has very small minute holes present in it. In this a lot of air gets trapped. When we squeeze it actually the air which is trapped gets out. But when we completely squeeze it as no air remains then we are not able to press it. This is why it is called as a solid.....

ii) When we boil water at 100° C it starts vaporizing. When we check the temperature of the steam it actually remains same. The hat that we gave to water is utilized by water to change its form without harming the temperature. This energy is called latent heat of vaporization and is present in steam. Therefore water vapours or steam has more energy than water....