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It takes 20 kg of oil to operate an oil boiler with an efficiency of 80%. In kWh, how much heat is generated? About 12

It takes 20 kg of oil to operate an oil boiler with an efficiency of 80%. In kWh, how much heat is generated? About 12 MWh/ton is the heating value of oil

If we have 350 kWh of electrical energy, what is electrical exergy in kWh?

In one room, 2 lamps with 8 W are installed and both lamps are lit for 5 hours per day. How much electrical energy in Wh is used in a week?

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