wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following reaction will proceed in forward direction on decreasing the temperature?

A
H2(g)+I2(g)2HI(g) ΔrH=+3000 cal
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
N2(g)+O2(g)2NO(g) ΔrH=43200 cal
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
2NH3(g)N2(g)+3H2(g) ΔrH=+22400 cal
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
CO2(g)C(s)+O2(g) ΔrH=+94300 cal
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B N2(g)+O2(g)2NO(g) ΔrH=43200 cal
If ΔH>0 then endothermic
If ΔH<0 then exothermic
In exothermic reaction, heat is liberated in products side. There is an increase in temperature as we go in the forward direction. Similarly for an endothermic reaction, there is a decrease in temperature in the forward direction.
On decreasing temperature, forward reaction will be favoured if there is an increase in temperature for that side. It happens for an exothermic reaction.
Only option B is an exothermic reaction because it has ΔH<0.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon