If crushed ice is heated in a beaker till it boils and rise in temperature is measured with thermometer, at what two points no rise in temperature is observed and why?
Answers
Answer:
At the point when ice at 0°C changes into water at 0°C, and then water at 100°C changes to water vapour at 100°C, no change in temperature will be measured with thermometer.
Explanation:
The reason is that when ice at 0°C changes to water at 0°C, then there is no change in kinetic energy but the change occurs in potential energy which we cannot measure by a thermometer. Same thing occurs when change of state takes place from water at 100°C to water vapour at 100°C.
The change in state takes place due to latent heat. This latent heat cannot be measured in thermometer. So there is no rise in temperature in this two cases.
Answer:
The change in state takes place due to latent heat. This latent heat cannot be measured in thermometer.
0°C changes to water at 0°C, then there is no change in potential energy which we cannot measure by a thermometer.