The heat of combustion of yellow Phosphorus and red phosphorus are -9.9I kJ/mol and -8.78 kJ/mol respectively. The heat of transition from yellow phosphorus to red phosphorus is

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- 1.13 kJ

- 18.69 kJ

+ 18.69 kJ

+ 1.13 kJ

answer is A.

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Detailed Solution

Pyellow →Pred HR=−9.91−[−8.78]=−9.91+8.78=−1.13kJ

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