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Assume That an Extremely Inefficient Electrical Utility Company Delivers Electrical

Question 18

Multiple Choice

Assume that an extremely inefficient electrical utility company delivers electrical energy to your home from a natural gas-burning power plant with an overall efficiency of only 31% and your furnace is 85% efficient in converting electrical energy into heat energy.What mass of natural gas the power plant must burn if heating your home requires 3.5 × 107 kJ? The heat of combustion of natural gas is 50.1 kJ/g.


A) 2650 kg
B) 8550 kg
C) 2250 kg
D) 10,100 kg

Correct Answer:

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