What is Dulong's formula?

Answer 1

The right formula is as following:

H.C.V = 338800 * C + 144000 * H2 + 9270 * S

If the fuel contains oxygen, then it is assumed that the whole amount is combined with hydrogen having mass equal to 1/8th of that of oxygen. Therefore, while finding the Calorific value of the fuel, this amount of hydrogen should be subtracted.

H.C.V = 338800 * C + 14400 * [H2 - O2 /8] + 9270 * S

Also visit http://technologydefination.blogspot.com

Higher Heating Value = 4184 { 8080 * C + 3444.4 * (H - O/8) + 2777.8 * S }

Answer 2

Dulong's formula is a rule for calculating the approximate molar heat capacity of solids. It states that the heat capacity of a solid element is approximately 3R, where R is the gas constant.