wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Bond energy of AB, A2 and B2 are in the ratio 1:1:0.5 and the enthalpy of formation of AB from A2 and B2 is 100 kJ mol1. Then the bond enthalpy of A2 is:

A
400 kJ mol1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
200 kJ mol1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
100 kJ mol1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
300 kJ mol1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 400 kJ mol1
12A2+12B2AB;ΔH=100 kJ/mol

ΔH= B.E. of reactants - B.E. of products

Let B.E. of AB be x.

B.E. of A2=x; B.E. of B2=x2

ΔH=x2+x4x

100=x4

x=400 kJ mol1

Bond enthalpy of A2=400 kJmol1

Correct option is 'A'

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Thermochemistry
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon