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Biogas contains 70% methane. The calorif...

Biogas contains 70% methane. The calorific value of methane is 55 kJ/kg. If a family requires 10,000 kJ of energy per day, how much biogas is needed per day?

Text Solution

Verified by Experts

55 k of energy is produced by
I g of methane. I0,000 kJ of energy is produced by
= 10,000/55 = 181.8g methane.
Since biogas contalns 70% methane, amount of biogas required per day
= 181.8 `xx `70/100 = 127.26 g .
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