NCERT Solutions for Class 8 Science Chapter 4 Combustion and Flame
Page No. 51 Exercise Question 11.
8th Science Chapter 4 Combustion and Flame
NCERT Academic Session 2023-2024
CBSE Board and Others state Board
Description:
Calorific value represents the energy released per unit mass or volume of fuel during complete combustion. It’s measured in joules per kilogram (J/kg) or kilojoules per kilogram (kJ/kg) and aids in assessing energy content for combustion processes, power generation, and fuel efficiency evaluations.
The calorific value of a fuel is the amount of heat energy produced when a specific quantity of the fuel is completely burned.
Given:
Mass of the fuel burned (m) = 4.5 kg
Heat produced (Q) = 180,000 kJ
The formula to calculate the calorific value (CV) of the fuel is:
Calorific Value (CV) = (Heat Produced)/(Mass of Fuel Burned)
Substitute the given values into the formula:
CV =(180,000kJ)/(4.5 kg)
CV = 40,000 kJ/kg
Therefore, the calorific value of the fuel is 40,000 kJ/kg