Question

If a process is endothermic with increasing disorder, then the reaction is

Select all that are True

spontaneous only below a certain temperatures

spontaneous at any temperature

spontaneous only above a certain temperatures

not spontaneous at any temperature

Answer 1

We know that a reaction is spontaneous if the Gibb's free energy is negative for that reaction and non - spontaneous if the Gibb's free energy is positive for the reaction.

Gibb's free energy is given by the relation :

∆G = ∆H - T∆S ........(l)

Where : G = gibb's free energy

H = Enthalpy

T = temperature

S= entropy

Therefore if a process is endothermic with increasing disorder, then the reaction is :

Spontaneous only above a certain temperature (when the ∆G becomes negative for the reaction from the given above relation (l).)