Question

A block of ice at $-{10}^{o}C$ is slowly heated and converted to steam at ${100}^{o}C.$ Which of the following curves represents the phenomenon qualitatively?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

Following steps occur in the given heating curve:

1. $-{10}^{\circ }C$ ice to $0^{\circ }C$ ice: Heat supplied increases the temperature.
2. $0^{\circ }C$ ice to $0^{\circ }C$ water: Heat supplied melts the ice to water at a constant temperature.
3. $0^{\circ }C$ water to ${100}^{\circ }C$ water: Heat supplied increases the temperature.
4. ${100}^{\circ }C$ water to ${100}^{\circ }C$ steam: Heat supplied boils the water to steam.