Question
The heat of combustion of yellow phosphorous & red phosphorous are - 9.91 KJ and - 8.78 KJ respectively. The heat of transition of yellow phosphorous to red phosphorous is:
Answer: Option D
:
D
The given equations for the combustions of different types of phosphorous are:
(y) P4+5O2⟶P4O10−9.91KJ−−−−−−(i)
(R) P4+5O2⟶P4O10−8.78KJ−−−−−−(ii)
Now when we subtract we get (i) - (ii) gives
(y) P4⟶(R)P4−1.13KJ
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D
The given equations for the combustions of different types of phosphorous are:
(y) P4+5O2⟶P4O10−9.91KJ−−−−−−(i)
(R) P4+5O2⟶P4O10−8.78KJ−−−−−−(ii)
Now when we subtract we get (i) - (ii) gives
(y) P4⟶(R)P4−1.13KJ
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