11 .   F o r   t h e   r e a c t i o n   C 3 H 8 + 5 O 2 3 C O 2 + 4 H 2 O ,   i f   t h e   s tan d a r d   e n t h a l p y   c h a n g e   i s   - 2 x 10 3   K J   m o l - 1 a n d   b o n d   e n t h a l p y   o f   C - C ,   C - H ,   C = O   a n d   O - H   a r e   347 ,   414 ,   741   a n d   464   K J m o l - 1   r e s p e c t i v e l y ,   c a l c u l a t e   t h e   b o n d   e n t h a l p y   o f   O = O .

Dear Student,
Kindly refer to the similar link -https://www.meritnation.com/ask-answer/question/estimate-change-in-enthalpy-for-the-following-reaction-c/chemistry/9043255
in the above link change in enthalpy is calculated but you have to calculate bond energy of oxygen only with simple mathematics.
Regards

  • -4
For Q8 use formula delta G=delta H -T Delta S
  • 5
bde of c3h8= 347*2+414*8= 4006
bde of 3co2= 741*2*3= 4446
bde of 4h2o= 464*2*4= 3712

enthalpy change= bond energy of reactant - bond energy of product
-2*10^3= (4006+ 5O2) - 8158
5o2 = 2125
bond energy of o2= 425

i hope that i have solved it correctly and can help you too❤
  • 13
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