Question

The sign of ΔHrxn and ΔSrxn for several different reactions are given. In which case is...

The sign of ΔHrxn and ΔSrxn for several different reactions are given.

In which case is the reaction spontaneous at all temperatures?

ΔHrxn<0; ΔSrxn>0ΔHrxn<0; ΔSrxn<0ΔHrxn>0; ΔSrxn<0ΔHrxn>0; ΔSrxn>0

Homework Answers

Answer #1

Answer – We know the change in the enthalpy is negative and change in entropy is positive of the reaction then the reaction is spontaneous at all temperatures, since we know the formula

∆Go = ∆Ho -T∆So

So when ∆Horxn < 0 and ∆Sorxn > 0 means ∆Horxn negative and ∆Sorxn is positive, then there is ∆Ho -T∆So come negative so, ∆Go is negative and reaction is spontaneous at all temp.

So, ΔHrxn<0; ΔSrxn>0 is the case where reaction spontaneous at all temperatures.

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