Define the coefficient of volume expansion of a solid and write its mathematical form. [1 + 2]
OR
Give one example of each of the thermal expansion of solid, liquid and gaseous substances from everyday experience. [1 + 1 + 1]
WBBSE
Class X
Physical Science
Thermal phenomena
03 Mark
2023
Definition: The coefficient of volume expansion of a solid is defined as the fractional increase in its volume per degree rise in temperature.
Coefficient of volume expansion (γ) = V_2 - V_1\over V_1(θ_2-θ_1)
OR
Examples of Thermal Expansion
- Solid: Railway Tracks – Railway tracks expand during hot weather, which can cause them to bend or warp if not properly spaced.
- Liquid: Thermometer – The mercury in a thermometer expands and rises when heated, allowing it to indicate temperature changes.
- Gas: Inflated Balloon – A balloon filled with air expands and may burst when heated, as the air inside takes up more space due to thermal expansion.
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