Question

Unit of calorific value of a substance is
(a) Kcal
(b) Joules
(c) J kg
(d) J/kg

Answer 1

Unit of calorific value of a substance is

(a) Kcal

• (b) Joules

(c) J kg

(d) J/kg

Calorific value provides the amount of energy that is released when a fuel or material undergoes the process of combustion. It is usually a measure of energy. The SI unit (international system of units) of calorific value is Joule/Kg or Kilo Joule/Kg.

Answer 2

The correct unit for the calorific value of a substance is J/Kg or Joules/Kilogram (option d).

• The calorific value refers to the quantity of energy released during burning.
• Joules/Kilogram is the International Standard Unit.
• This unit is recognized based on the amount of heat produced by the combustion process or the amount of energy obtained by cellular metabolism.
• The amount of heat created when 1 kilogram of any material or fuel is combusted is used to calculate this energy.
• Kcal is a measure for indicating the amount of energy acquired after consuming a particular food and Joules is the only unit of heat.
• As a result, the correct unit of calorific value for any substance is Joules/Kilogram.