The sun produces energy via fusion One of the fusion reactions that occurs in th

Question

The sun produces energy via fusion One of the fusion reactions that occurs in the sun is 4^1_1H rightarrow^4_2He + 2^0_1e How much energy in joules is released by the fusion of 1 90 g of hydrogen Express your answer lo three significant figures and include the appropriate units. Nuclear power plants produce energy using fission One common fuel uranun-235 produce energy through the fission reaction fission fragments + neutron. + 3.20 times 10^-11 J/atom What mass of uranium-235 is needed to produce the same amount of energy as the fusion reaction in Part A? Express your answer to three significant figures and include the appropriate units.

Explanation / Answer

Total energy = 3.2*10^-11 J/ atom x 6.023*10^23 atoms /mol

Enrgy in part-A =1.17x10^12

Mass of U235 required == (1.17x10^12)*235 /(3.2*10^-11*6.023*10^23)

= 14.265 grams

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