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Re:For First Time Since 1800s, Britain Goes a Day Without Bu... by Symbiote on Saturday April 22, 2017 @06:55AM (#14171958)
> coal on the fire is going to give out ~10Kg of CO2 'easily'

Very easily.

C + O₂ → CO₂

Carbon has atomic mass 12, oxygen 16.

12 + 32 → 44

So to produce 10kg of CO₂ we need only burn 2.7kg of coal.

This is why burning methane gives more heat for the same amount of carbon dioxide − we get the energy from producing water as well:

CH₄ + 2O₂ → CO₂ + 2H₂O

We have the same C → O=C=O, but we also have two sets of H-O-H bonds giving energy.

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