Question

What is the physical state of water at:
A) 250 \[^{o}C\]
B) 100\[^{o}C\]

Answer 1

Hint: Water exists in all three states of matter; they are as ice in solid form, as water in liquid form, and vapour as gaseous form. These interconversion of states of matter are noticeable to all humans in day to day life.

Complete step by step answer:
a. 250 \[^{o}C\]
The physical state of water at 250 \[^{o}C\]is a gaseous state. We all know that the boiling point of water is 100\[^{O}C\]. After attaining the temperature 100\[^{o}C\], the water starts converting into a gaseous state as it changes into vapours and boiling occurs. 250 \[^{o}C\] which is much above the boiling point of water. So, the physical state of water at 250 \[^{o}C\]is a gaseous state.
b. 100\[^{o}C\]
The physical state of water at 100\[^{o}C\] means it is nothing but the boiling point temperature. The water at 100\[^{o}C\] will be both in the liquid state as well as the gaseous state. This is because, at 100\[^{o}C\], the liquid state of water starts changing into its gaseous state (steam).

Note: Don’t be confused with the words boiling point and freezing point. Both are not the same.
Boiling point: The temperature at which the vapour pressure of a substance is equal to the pressure of the atmosphere on the liquid is called the boiling point.
Freezing point: The temperature at which a liquid becomes a solid is called freezing point.
The boiling point of water is 100\[^{o}C\].
The freezing point of water is 0\[^{o}C\].