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------------------------------------------------ Lignite coal has a heat content of 7000 BTU/lb. Convert this to joules/kg.

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).

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