College Physics
College Physics
10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Chapter 30, Problem 14P

(a)

To determine

The energy released in Joules in proton-proton cycle fusion reaction.

(b)

To determine

The number of proton-proton cycles occurring per second in the Sun.

(c)

To determine

The change in the Sun’s mass each second.

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The proton – proton cycle responsible for the Sun’s 3.84 x 1026 W power output yields about 26.7 MeV of energy for every four protons that are fused into a helium nucleus. Determine (a) the energy in joules released during each proton – proton cycle fusion reaction, (b) the number of proton – proton cycles occurring per second in the Sun, and (c) the change in the Sun’s mass each second due to this energy release.
Each fusion reaction of deuterium (H2) and tritium (H3) releases about 20.0 MeV. The molar mass of tritium is approximately 3.02 g. What mass (m) of tritium is needed to create 1015 J of energy, the same as that released by exploding 250,000 tons of TNT? Assume that an endless supply of deuterium is available. m = ? kg
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