Q&A Forum
##### Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear

Nov 12, 2013

# In an experiment 4.5 kg of a fuel was completely burnt.The heat produced was measured to 180000 kJ. Calculate the calorific value of the fuel.

I found the answer as 40000 KJ/Kg but the answer in the Learn Next NCERT Science Solution it is given as 4000KJ/Kg.When I referes to the Calculator it shown that 180000/4.5= 40000.

Sachin

Member since

solution=  180000/4.5  =  1800000/4.5 as the decimal goes to N = numerator  =4000kj/kg ok

Member since Apr 24, 2013

Ans: Calorific value: The amount of heat energy released on complete combustion of 1 kg of a fuel is called calorific value. It is expressed in a unit called kilo joule per kg (kJ/kg).   Calorific value = heat produced / weight of fuel used in Kgs Heat produced = 180000 kJ Weight of the fuel used in Kgs = 4.5   Calorific value     = 180000/ 4.5                            = 40000 kJ/kg
###### Like NextGurukul? Also explore our advanced self-learning solution LearnNext
Offered for classes 6-12, LearnNext is a popular self-learning solution for students who strive for excellence
Explore
Animated Video
lessons
All India
Test Series
Interactive Video
Experiments
Best-in class
books