Please help: Consider a reaction that has a positive H and a positive S. Which o
ID: 972934 • Letter: P
Question
Please help:
Consider a reaction that has a positive H and a positive S. Which of the following statements is TRUE?
This reaction will be nonspontaneous at all temperatures.
This reaction will be spontaneous only at high temperatures.
This reaction will be nonspontaneous only at high temperatures.
This reaction will be spontaneous at all temperatures.
It is not possible to determine without more information.
This reaction will be nonspontaneous at all temperatures.
This reaction will be spontaneous only at high temperatures.
This reaction will be nonspontaneous only at high temperatures.
This reaction will be spontaneous at all temperatures.
It is not possible to determine without more information.
Explanation / Answer
With reaction having both dH and dS values +ve. for sponatenous reaction we need -ve value for dG, so
This reaction will be spontneous only at high temperature.
dG = dH - TdS
For -ve dG we want TdS term to be greater than dH term which can be possible only If T is higher.