ch43-p043 - 43. (a) The mass of a carbon atom is (12.0...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
(3.3 × 10 7 J/kg)/(5.02 × 10 25 atom/kg) = 6.58 × 10 – 19 J/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 – 27 kg/u) = 7.31 × 10 – 26 kg. Each combustion event produces 6.58 × 10 – 19 J so the energy produced per unit mass of reactants is (6.58 × 10 – 19 J)/(7.31 × 10 – 26 kg) = 9.00 × 10 6 J/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
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

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.

Ask a homework question - tutors are online