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Question: The heat of combustion of yellow phosphorus and red phosphorus are – 9.91 KJ/mol and – 8.78 KJ/mol r...

The heat of combustion of yellow phosphorus and red phosphorus are – 9.91 KJ/mol and – 8.78 KJ/mol respectively. The heat of transition from yellow phosphorus to red phosphorus is –

A

– 1.13 KJ

B

– 18.69 KJ

C
  • 18.69 KJ
D
  • 1.13 KJ
Answer

– 1.13 KJ

Explanation

Solution

Pyellow ¾¾¾® Pred

HR = –9.91 – [–8.78]

= –9.91 + 8.78

= –1.13 KJ