Question

The property of matter to increase in size on heating is called:

Answer 1

In this question, we will discuss the basic concept of thermal expansion in matter. Also, as there are different matter present in solid, liquid and gas, we will study how these matter affect the sound speed. Also, we will see about temperature for our better understanding.

Complete answer:
As we know, any particle or object that occupies space and has some mass is called matter.
Thermal expansion is the change in size of an object as its temperature changes. Also, we know that thermal expansion is defined as the tendency of the matter to change its shape, area, volume, and density in response to the change in temperature. Thermal expansion generally does not include phase transitions.
Therefore, thermal expansion is the property of matter to increase in size on heating.

Additional information:
A sound travels fastest in solids, slowest in air and water is in between. The reason behind this is that the particles in solids are closer together than the particles in liquids or gases. Also, the particles in liquids are closer together when compared to the particles in gases.
Since, the tighter particles are packed in a space, they collide more frequently. This allows sound, which is simply the combined collisions of particles, to travel fastest in solids. Pressure applied on an object is defined as the force exerted on the object per unit area.
We also know that temperature is the measure of hotness or coolness of any object. Temperature is measured in Kelvin, Celsius. Units of temperature are represented by K and C.

Note:
We should remember that the thermal expansion actually changes the space between particles of a substance, which further changes the volume of the substance while negligibly changing its mass. There are different types of matter present in solid, liquid and gases.