GENERAL KNOWLEDGE

Detailed explanation-1: -After melting, the heat addition causes an increase in the temperature of the liquid until the boiling point is reached. Some of the molecules in a liquid have high enough kinetic energy to cross the liquid-gas boundary and become gas phase. This process is called vaporization.

Detailed explanation-2: -Evaporation and boiling During evaporation, particles with enough energy can escape the liquid as a gas. Unless energy is transferred from the surroundings by heating, the liquid gradually becomes colder. Boiling happens when enough energy is transferred that the substance evaporates as fast as it can.

Detailed explanation-3: -VAPORIZATION When water reaches its boiling point of 100ºC, water molecules are moving so fast that they break free of the attractions that hold them together in the liquid state. The result is vaporization-the liquid be-comes a gas.

Detailed explanation-4: -Energy is required to change from solid to liquid, liquid to gas (evaporation), or solid to gas (sublimation). Energy will be released to change from liquid to solid (fusion), gas to liquid (condensation), or gas to solid.