SSC MTS EXAM

SSC

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following phase changes is exothermic?
A
melting
B
freezing
C
vaporization (evaporation)
D
sublimation
Explanation: 

Detailed explanation-1: -1-freezing, condensation, and deposition, which are the reverse of fusion, sublimation, and vaporization-are exothermic.

Detailed explanation-2: -When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction.

Detailed explanation-3: -Freezing is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point. In accordance with the internationally established definition, freezing means the solidification phase change of a liquid or the liquid content of a substance, usually due to cooling.

There is 1 question to complete.