Question

What is the unit of calorific value?
A. $KJ/Kg$
B. $KJ/lit$
C. $Km/hr$
D. $Kcal$

Answer 1

Calorific value is the amount of heat energy present in food or fuel which is further determined by complete combustion of specified quantity at constant pressure in normal conditions. It is also known as calorific power.

Complete answer:
We know that by the combustion process water vapors are generated and with the help of some special techniques heat is recovered during these combustion processes. If the heat contained in the water vapor has a possibility to be recovered then it is said that the process has high calorific value and if heat contained in the water vapor can-not be recovered then the solution has low calorific value.
The efficiency of any food or fuel also depends upon its calorific value. Its calorific value is high then efficiency is also high and if calorific value is low then efficiency is also low and in short we can say that calorific value is directly proportional with the efficiency. The unit of calorific value is kilojoule per kilogram which can be symbolically represented as $KJ/Kg$. LPG has a very high calorific value that’s why it is so much efficient in nature.

Thus option A is the correct answer.

Note:
It is very important to have a knowledge about the calorific value of fuel to carry out our day-to-day activities as this knowledge helps us to determine the amount of energy we transport and also tells about the average of any vehicle and in human bodies calories also play an important role.