Question

DEFINE COEFFICIENT OF THERMAL CONDUCTIVITY.AND MENTION ITS SI UNIT.

Answer 1

Answer:

Thermal conductivity coefficient is the quantity of heat that is transported through a unit cube of two surfaces of perpendicular distance to each other in a given unit of time when the difference in temperature of the two surfaces is 1°C and its unit is W/m∗K

Answer 2

Answer:

• The quantity of heat that conducts per unit time through a unit cube of material while its opposite faces are held at a temperature differential of one degree is defined as the coefficient of thermal conductivity of the material.
• SI unit :  W m-1K-1.

Explanation:

• The rate of movement of heat per unit area per unit temperature gradient across a solid is equal to the coefficient of thermal conductivity of the material.
• The quantity of heat that travels in one second across the opposite faces of a unit cube whose faces are held at a temperature differential of 1°C is defined as the coefficient of thermal conductivity of a substance.