Answer :
Final answer:
To convert 7000 Btu/lb to Joules/kg, multiply by 1,055 J/Btu and divide by 0.453592 kg/lb, resulting in approximately 16.29 MJ/kg.
Explanation:
To convert the heat content of lignite coal from British Thermal Units (Btu) per pound to Joules per kilogram (J/kg), we need to use the following conversion factors: 1 Btu equals about 1,055 Joules, and 1 pound is approximately 0.453592 kilograms.
Here is the calculation:
- 7000 Btu/lb × 1,055 J/Btu = 7,385,000 J/lb
- 7,385,000 J/lb / 0.453592 kg/lb = ~16,286,472 J/kg
Therefore, lignite coal with a heat content of 7000 Btu/lb is equivalent to approximately 16.29 MJ/kg (since 1 MegaJoule is 10^6 Joules).
