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Q.

What is heat of atomisation of $P_{4} O_{6} (s)$ ? Given heat of sublimation of $P_{4} O_{6}$ is $x kJ / mol$ and $P - O$ bond energy is $y kJ / mol$

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a

$x + y$

b

$x + 8 y$

c

$x + 12 y$

d

$x + 6 y$

answer is D.

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Detailed Solution

The heat of the atomisation is found by the relation as,

Question Image

Enthalpy of atomisation $= x + y x 12$

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What is heat of atomisation of P4O6(s)? Given heat of sublimation of P4O6 is x kJ/mol and P-O bond energy is y kJ/mol