Is Boiling Point Intensive: Why, How And Facts


The intensive properties are those which does not depend upon the quantity of the matter and do not vary if we change the proportion of the matter is changed.

The intensive properties are melting point, specific gravity, chemical component, the hardness, density, color, specific heat enthalpy, the refractive index, and so is boiling point intensive as the boiling point of the liquid does not change even if the quantity of the liquid is increased.

Why boiling point is an intensive property?

The boiling point of the liquid defines the heat energy required for the specific liquid to change its phase from liquid to vapor.

The heat required to do this depends upon how strong the bonds are formed between the molecules constituting a chemical composition of a given liquid and it remains the same irrespective of the volume of the liquid, hence it is an intensive property.

The boiling point well talks about the change of phase from liquid to vapor breaking the intermolecular bonding between the molecules and free moving molecules in random motions. The amount of heat required to reach this phase always remains constant.

Is the boiling point of water intensive or extensive?

The temperature at which water starts boiling is the same which is a hundred degrees Celsius even if you increase the volume of the liquid.

The temperature at which the water starts boiling does not change even if you change the container or whatever the shape, size, or metal of the container you are using. Hence it is an intensive property of the water.

The extensive properties are those that vary if you change the quantity of the matter. If you remove the part of the mass of the matter then its weight will reduce, if you deform it then its shape, and size will change.

While the intensive properties of the matter do not changes. It measures the internal properties of the matter like the internal heat acquired by the moles, the gravity, the chemical energy, and the heat energy required to break the bonds.

What is an elevation in boiling point?

The elevation in boiling point is the peak temperature rosed after the liquid has reached the temperature at which the liquid starts boiling.

The boiling point attained by the liquid which has dissolved a solute is more than its actual. This is due to the fact that the particles of the solute grasp the heat energy that is supplied to the liquid thus increasing the required heat energy.

The rise in the boiling point of the liquid on the addition of solute is

ΔT=iKbm

Where ΔT is the increase in temperature

i is Van’t Hoff factor

iKbm is molal boiling point

m is the molality of a solution

You can observe the change in the boiling point of the water when you add sugar to the water in the container. The heat energy is supplied to the sugar cubes and the addition of sugar to the water increases the density of the water too.

Hence we can say that the boiling temperature of the liquid is related to the density of the liquid. The more the density of the liquid the higher the boiling temperature of the liquid.

What happens at the boiling point of the liquid?

At a boiling point, the liquid turns into its vapor phase.

The heat energy acquired by the atom comprising the liquid is utilized to break the bonds between the molecules that hold them tightly bonded. The breaking of the bond increases the intermolecular spacing between the molecules.

is boiling point intensive
Vapors accumulated on the lid evaporated from the water reached the boiling point; Image Credit: pixabay

As the intermolecular spacing between the molecules increases, the molecules become boundless and escape from the volume of liquid into the air, thus converting liquid into the vapor state.

How does liquid attain the boiling point?

The molecules of the liquid obtain the heat energy required to break the bond from the surrounding.

The molecules of the liquid are bonded together by sharing the bond and the strength of the bond depends upon the potential energy stored by the bond. As these bonds break this chemical energy is converted into the heat energy which is released into the surrounding.

Enough energy is required to break this bond which is initially supplied by the heat supply and the chemical potential energy which is converted into the heat energy.

Does the boiling point of the liquid rise with the increasing pressure?

The temperature of the system rises below the depth with the increasing pressure acting on a mass.

The boiling point of the liquid rises if the pressure over the system increases and in the same way the temperature at which the liquid starts boiling is lower down if the pressure on the system is decreased.

The water boils at 1000 C at normal atmospheric pressure, but if we try to boil the water at higher altitudes the water will boil quickly at a lower temperature. As we climb higher the altitude, the pressure goes on decreasing, and accordingly the temperature required to boil the water also decreases.

Is the melting point of the matter an intensive property?

The melting point is the temperature at which the solid matter turns into liquid.

The temperature at which the matter starts melting remains the same for any quantity of the matter and hence it is an intensive property.

What are the extensive properties of matter?

We are talking about those properties of the matter those changes in the variation of quantity or application of external sources.

The extensive properties of matter are the shape, size, volume, tension, the force applied on a matter, weight, mass, etc. that can vary if we change the quantity of the matter or impose the pressure on the system.

Are intensive properties physical property?

The physical properties tell about the characteristics of the matter, its appearance, and its specific features.

The physical properties of matter like specific gravity, ductility, color, enthalpy, boiling point, melting point, chemical composition, and chemical potential energy stored with the bonds between molecules, which do not change and hence are intensive properties.

Does the boiling point of liquid rise on adding solute to its volume?

The addition of any impurity or solute to the liquid increases the boiling temperature of that liquid.

This is due to the fact that the heat energy is grasped by the particle of solute and hence more heat energy is required by the molecules of the liquid to reach its boiling point at which the phase transition occurs.

Conclusion

The boiling point is an intensive property of the liquid. The intensive property of the matter does not change on a variation of any physical quantity of the matter. The boiling point of the liquid does not change without the addition of solute to the liquid.

AKSHITA MAPARI

Hi, I’m Akshita Mapari. I have done M.Sc. in Physics. I have worked on projects like Numerical modeling of winds and waves during cyclone, Physics of toys and mechanized thrill machines in amusement park based on Classical Mechanics. I have pursued a course on Arduino and have accomplished some mini projects on Arduino UNO. I always like to explore new zones in the field of science. I personally believe that learning is more enthusiastic when learnt with creativity. Apart from this, I like to read, travel, strumming on guitar, identifying rocks and strata, photography and playing chess. Connect me on LinkedIn - linkedin.com/in/akshita-mapari-b38a68122

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