The chemical energy releasedby burning a gallon of gasoline, Ask an Expert

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The chemical energy releasedby burning a gallon of gasoline is approximately1.3x10^5KJ.estimatethe total energy used by all of the cars in the US during thecourse of one year. what fraction does this represent of the totalenergy by the US in one year(currently about 5x 10^20 J)

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