Question

Q.6 What do
I
understand by thermal
hansion of a substance & explain with
you
example.​

Answer 1

Explanation:

Iron is a chemical element with symbol Fe and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is by mass the most common element on Earth, right in front of oxygen, forming much of Earth's outer and inner core. Wikipedia

Symbol: Fe

Atomic mass: 55.845 u

Atomic number: 26

Electron configuration: [Ar] 3d64s2

Melting point: 1,538 °C

Density: 7.874 g/cm³ (near room temperature)

Answer 2

Answer:

The expansion of a substance on heating is called thermal expansion of the substance.

Explanation:

Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions. Temperature is a monotonic function of the average molecular kinetic energy of a substance.