1. Survey the availability of various fuels in your locality. Find out their cost per kg and prepare a tabular chart showing how many kJ of various fuels you can get for every rupee.
Answer:
Please refer to the table below:
| Fuels in my Area | Cost per kg (rupee) | Calorific Value (kJ/kg) | kJ/rupee |
| LPG | 70 | 55000 | 785.71 |
| Kerosene | 89.51 | 45000 | 502.737 |
| Wood | 4 | 17000 – 22000 | 4250 – 5500 |
| Coal | 8 | 25000 – 33000 | 3125 – 4125 |
| CNG | 106 | 50000 | 471.98 |
| Petrol | 155.57 | 45000 | 289.25 |
| Diesel | 111.17 | 45000 | 404..79 |
Sample Calculation for LPG:
1 kg of LPG on combustion produces 55000 kJ of heat.
1 kg of LPG costs 70 rupees.
So, 70 rupees worth of LPG produces 55000 kJ of heat.
Therefore, 1 rupee worth of LPG produces (55000 KJ/70) = 785.71 kJ of heat.
“Survey the availability of various fuels in your locality. Find out their cost per kg and prepare a tabular chart showing how many kJ of various fuels you can get for every rupee.” – Solved.
Related Links:
Solution to Extended Learning Problem 2
Solution to Extended Learning Problem 3
Solution to Extended Learning Problem 4
Solution to Extended Learning Problem 5
Solution to Activity 4.1
Solution to Activity 4.2
Solution to Activity 4.3
Solution to Activity 4.4
Solution to Activity 4.5
