When a person has fever, his body temperature becomes more than the normal body temperature. If we put strips of wet cloth on the forehead of a person suffering from…
(a). The water will cool initially till it reaches 00C, the freezing point. At this stage, the temperature will remain constant till all the water will freeze. After this, temperature…
Solid Co2 Is known as dry ice. This is because it directly gets converted into gaseous state without passing through liquid state on decreasing the pressure to 1 atmosphere.
The amount of heat that is required to change 1 kg of solid into liquid at atmospheric pressure without any change in temperature at its melting point, is known as…
The temperature of a substance remains constant at its melting and boiling point until all the substance melts or boils because, the heat supplied is continuously used up in changing…
The temperature of both boiling water and steam is 100° C, but steam has more energy because of latent heat of vaporisation.
(a) To check whether the substance is pure or not. (b) To identify and characterise the substance.
Steam at 100°C is better for heating purposes than water at 100°C because the energy of 1 steam at 100°C is 22.6 × 100 Joule which is more than that…
Yes, a rubber band changes shape under force and regains the same shape when the removed. It breaks on applying excessive force. Yes, it is a solid.
Cases are compressible because the intermolecular space is very large in gases, whereas liquids are not compressible because in liquids, the intermolecular space is less.