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प्रश्न
What is heat? What is the S. I. unit of heat?
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उत्तर
Heat is a form of energy, which when absorbed by a body makes it hot and when extracted from a makes it cold. It is also defined as the total kinetic energy possessed by all the molecules of a body. The S. I. unit of heat is joule/kg kelvin.
संबंधित प्रश्न
Differentiate between heat capacity and specific heat capacity.
A mass m1 of a substance of specific heat capacity c1 at temperature t1 is mixed with a mass m2 of other substance of specific heat capacity c2 at a lower temperature t2. Deduce the expression for the temperature t of the mixture. State the assumption made, if any.
The specific heat capacity of water is :
m kg of a substance of specific heat capacity s J/kg °C is heated so that its temperature rises from θ1°C to θ2°C. Write down the expression for the heat Q supplied.
Write the approximate values of the specific latent heat of vaporization of steam.
Why is specific heat capacity taken as a measure of thermal inertia?
Is it possible to condense the water formed, back to ice by adding ice at 0°C. Explain with reason.
63.2 g of copper at 50°C can just melt 3.8g of ice. If the specific latent heat of ice is 336 J/g, find the specific heat capacity of copper.
Derive Mayer’s relation.
Define specific heat capacity.
