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The atomic mass of Li,He, and proton are...

The atomic mass of Li,He, and proton are 7.01823 amu, 4.00387 amu, and 1.00715 amu, respectively. Calculate the energy evolved in the reaction.
`._(3)Li^(7) rarr ._(1)P^(1) rarr 2 ._(2)He^(4) + Delta E`
Given 1 amu `= 931 MeV`.

Text Solution

Verified by Experts

Mass of reactant = Mass of Li + Mass of `p`
`= 7.01823 + 1.00725 = 9.02538 "amu"`
Mass of products `= 2 xx` Mass of `"He"`
`2 xx 4.00387 = 8.0074`
`= 0.01764 "amu"`
`:.` Mass loss during change `= 8.02538 - 8.00774`
`= 0.01764 "amu"`
`:.` Energy evoled during reaction `= 0.01764 xx 931`
`= 16.423 "amu"`
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