What is the physical state of water at 125℃?
a.) Solid
b.) Liquid
c.) Gas
d.) None of the above

Question

What is the physical state of water at 125℃?a.) Solidb.) Liquidc.) Gasd.) None of the above

Vedantu Content Team · Accepted Answer

Hint: We know water exists in all the three states i.e. solid, liquid, gas. The interconversion of matter is visible in normal day to life. It depends on the temperature of water in all the three states.

Complete step by step solution:

Matter can exist in either of three main states: solid, liquid, or gas
Solid matter is composed of tightly packed particles, that means solid will retain its shape. The particles in solids are not free to move around.
Liquid matter is made of more loosely packed particles than solids. It will take the shape of its container. Particles can move about within a liquid, but they are packed densely enough that volume is maintained.
Gaseous matter is composed of particles packed so loosely that it has neither a definite shape nor a definite volume.
A solid can be transformed into a liquid through melting, and a liquid can transform into a solid through freezing. A solid can also change directly into a gas through a process called sublimation.
A liquid can be converted to a gas through heating at constant pressure to the substance’s boiling point. This process of a liquid changing to a gas is called evaporation.
A gas at a temperature below its critical temperature can also be called a vapor. A vapor can be liquefied through compression without cooling.
Now, in the given question, the boiling point of water is 100°C, that means it converts into gas or vapour at this temperature. In the given question the temperature is 125°C. That clearly means the physical state of water will be gas.

Therefore, from the above statements we conclude that the correct answer is (c).

Note: When thermal energy is added to a substance the temperature of the substance increases, which can change its state from solid to liquid, liquid to gas, or solid to gas. When energy is removed, the opposite happens, decreasing the substance’s temperature and turning it from liquid to solid, gas to solid, or from gas to liquid.