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

Quick lime (CaO) is produced by heating limestone (CaCO3) to drive off CO2 gas.
CaCO3(s)CaO(s)+CO2(g),ΔHo=180KJ,ΔSo=150J/K
Assuming that variation of enthalpy change and entropy change with temperature to be negligible, choose the correct option.

A
decomposition of CaCO3(s) is never spontaneous.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
decomposition of CaCO3(s) becomes spontaneous when temperature is less than 900oC
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
decomposition of CaCO3(s) becomes non-spontaneous when temperature is greater than 1000oC
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
decomposition of CaCO3(s) becomes spontaneous when temperature is greater than 927oC
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D decomposition of CaCO3(s) becomes spontaneous when temperature is greater than 927oC
T=ΔHΔS=180×103150=1200K.
Temperature=1200273=927oC
For ΔG<0,T>927oC

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