Question

25g ice crystals are taken in a beaker and inserted a thermometer into it and slowly heated. Answer the following questions based on the above experiment.

a) At what temperature does ice start melting?
b) At 50°C, what is the physical state of ice?
c) At 100°C, the boiling point of a substance is not rising for some time. What is the reason for it?
d) What is the boiling point of the substance?
e) What is the physical state of the substance above 100°C?

Answer 1

a) The ice starts melting at 0°C. b) At 50°C, ice is in a liquid state. c) At 100°C, the boiling point of water, the temperature remains constant for some time. d) The boiling point of water is 100°C. e) Above 100°C, the substance is in a gaseous state.

Step-by-step explanation:

a) The ice starts melting at 0°C. At this temperature, the ice begins to melt, absorbing heat without changing its temperature.

b) At 50°C, ice is in a liquid state, as it has melted and has reached a temperature above 0°C.

c) At 100°C, the boiling point of water, the temperature remains constant for some time because the water is undergoing a phase change from liquid to gas. During this phase change, the water absorbs heat without increasing its temperature.

d) The boiling point of water is 100°C at atmospheric pressure.

e) Above 100°C, the substance is in a gaseous state, as it has changed from liquid to steam vapor.