According to Prevost theory of heat exchange

all bodies above absolute zero emit radiation

heat transfer by radiation requires no medium

it is impossible to transfer heat from low temperature source to t high temperature source

rate of heat transfer depends on thermal conductivity and temperature difference.

What is Dimensional Formula of Heat Energy and its Derivation?

The dimensional formula of Heat Energy is given by,

[M¹ L²T^-2]

Where,

Energy is the ability to do work.

∴ dimensional formula of Energy = dimensional formula of Work

Work (W) = Force (F) × Displacement . . . . . (1)

Since, F = M × a = M × [M⁰ L¹ T^-2]

∴ The dimensions of Force (F) = M¹ L¹ T^-2 . . . . (2)

On substituting equation (2) in equation (1) we get,

Work = [M¹L¹T^-2] × [M⁰L¹T⁰] = [M¹ L²T^-2].

Therefore, heat energy is dimensionally represented as [M¹ L²T^-2].

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