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

The heats of formation of C6H6(l),H2O(l),CO2(g) are 11.70,68.4 and 94.0 kcal respectively. Calculate the heat of combustion of benzene(l).

A
780.9 kcal−780.9kcal
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
−680.9 kcal−780.9kcal
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
580.9 kcal−780.9kcal
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
480.9 kcal−780.9kcal
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 780.9 kcal−780.9kcal
Heat of combustion of benzene = 3× heat of formation of water + 6× formation CO2 - heat of foemation of benzene
Heat of combustion of benzene = 3(68.4)+6(94)(11.70)=780kcal

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