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Grade: 12th pass 
        The ratio of 1st, 2nd , 3rd ionisation energies of lithium is 1:4:9. Find The energy in joules per mole for the reaction Li(g) - Li3+ + 3e
2 years ago

Answers : (1)

Vikas TU
6930 Points 
							
Reacns. for first second and third ionisation energies respectively are:
Li  --------->   Li+   +  e- | 1J
Li+  ----------->   Li2+   +   e-  | 4J
Li2+ ------------->   Li3+  +  e-   | 9J
Adding all three eqns. we get,
Li  ---------->   Li3+   +   3e- | 1 + 4 + 9 => 14 Joules.
Hence.
2 years ago
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