Question

Mention the coefficient of
a. Superficial expansion
b. Cubical expansion

Answer 1

Answer:

The coefficient of superficial expansion is defined as the increase in area per unit original area at 00c per unit rise in temperature. Note: The magnitude of the coefficient of superficial expansion is so small that it is not necessary to take the initial temperature as 0 °C.

Answer 2

Answer:

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Explanation:

a. Superficial Expansion of Solids: The coefficient of superficial expansion is defined as the ratio of increase in area to its original area for every degree increase in temperature. Coefficient of superficial expansion = Increase in area / (Initial area – Rise in temp) (°C) = 2 × coefficients of linear expansion

b. Coefficient of cubical expansion of a liquid can be defined as the fractional change in volume of liquid per kelvin(or degree celsius) change in temperature.

mathematically :-

dV / V = Y dT

where dV is the change in volume, V is the initial volume, Y is the coefficient of cubical expansion of liquid, dT is change in temperature.