Question

Which of the following substances has the maximum calorific value ?
(A)
Coal
(B)
Cowdung
(C)
Hydrogen
(D)
Kerosene oil​

Answer 1

Answer:

C. Hydrogen is the answer

Answer 2

Substance has the maximum calorific value is Hydrogen.

Option (C)

Explanation:

• Calorific value is the energy that is synthesized when a susbtance is burnt completely.
• The unit of calorific value is kJ/Kg.
• Calorific value = Heat/Amount of substance/fuel consumed in kg.
• The calorific value is given for some substances :

1. Coal - 8,000 kcal/kg
2. cow dung - 6000-8000 kcal/kg
3. Kerosene – 45000 kcal/kg
4. Hydrogen – 1,50,000 kcal/kg

• Among the four, hydrogen has high calorific value.
• The fuels used for Internal combustion engines are selected based on the calorific value.
• The higher the calorific value, the higher the energy released.

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