(3.3 ×107J/kg)/(5.02 ×1025atom/kg) = 6.58 ×10– 19J/atom. This is 4.11 eV/atom. (b) In each combustion event, two oxygen atoms combine with one carbon atom, so the total mass involved is 2(16.0 u) + (12.0 u) = 44 u. This is (44 u)(1.661 ×10– 27kg/u) = 7.31 ×10– 26kg. Each combustion event produces 6.58 ×10– 19J so the energy produced per unit mass of reactants is (6.58 ×10– 19J)/(7.31 ×10– 26kg) = 9.00 ×106J/kg. (c) If the Sun were composed of the appropriate mixture of carbon and oxygen, the number of combustion events that could occur before the Sun burns out would be (2.0
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This note was uploaded on 05/19/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.