25 Jul '11 23:21>
Originally posted by CalJust1 kwhr is 3.6 megajoules? 1000 watts for one second=1 kilojoule so 1000 times 3600 seconds, I see it now, 3,600,000 joules. ONE watt for one hour = 3,600 joules.
The atomic weight of C is 14 and O is 16.
So 14 kg of C makes 46 kg of CO2.
In rough figures, therefore, 1 kg of coal makes 3 kg of CO2 (if the ash content is not too high)
1 kWh is equivalent to 3,6 MJ.
As a rule of thumb, depending on the grade of coal and the efficiency of the power station, if you say that 1 kWh of electricity results in approx 1 kg of CO2 you will not be far from wrong.