A block of ice at temperature - 20°C is slowly heated and converted to steam at 100°C. Which of the following diagram is most appropriate?

Question

A block of ice at temperature - 20°C is slowly heated and converted to steam at 100°C. Which of the following diagram is most appropriate? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

The ice at - 20°C converts to ice at 0°C, thus having an increase in temperature. On further heating, ice at 0°C is converted into water at 0°C, thus the temperature remaining constant, a change of phase occurs. Water at 0°C when heated changes to water at 100°C, thus resulting in an increase of temperature. Water at 100°C changes to steam at 100°C, thus resulting in a change of phase.

Q. A block of ice at temperature - 20∘C is slowly heated and converted to steam at 100∘C. Which of the following diagram is most appropriate?

Q. A block of ice at temperature - 20 $^{\circ}$ C is slowly heated and converted to steam at 100 $^{\circ}$ C. Which of the following diagram is most appropriate?