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How many gallons of gas to charge an iPhone?

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Tom:
There's an echo in here.

Wendy:
Hello.....Hellooooo.....Helloooooooooooooo
 

taoshum:

--- Quote from: Gary RV Roamer on June 25, 2012, 02:45:08 PM ---How many gallons of gas would it take to charge an iphone?  Not as silly a question as it sounds, once you start thinking of energy equivalents and what engineers call "energy density".

Would you believe that the energy in a gallon of unleaded regular gasoline (the real stuff, not gasahol) would charge an iphone every day for almost 20 years?  Read about that and other interesting energy facts in this short article from Exxon.

http://www.exxonmobilperspectives.com/2011/12/14/how-many-gallons-of-gasoline-would-it-take-to-charge-an-iphone/

--- End quote ---


OTOH, in a few years or less, when there are 2+ billion "smart phones", being charged everyday, it will take 100 million gallons of gas to charge all the smart phones for a year.  If the numbers above did not account for the conversion of gasoline to electricity, then it will take 300,000,000 gallons of gas (or equivalent) to generate the electricity to charge the smart phones.  We don't use gasoline to make most of our electricity but at 13 cents per kilowatt hour; it will cost $422 million per year to charge all the smart phones.  "no free lunch"

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