Which could lead to a negative free energy value?

Question

Which of the given conditions leads to a negative free energy value (spontaneous reaction)?

slightly negative enthalpy and highly negative entropy

highly positive enthalpy and highly negative entropy

highly positive enthalpy and slightly positive entropy

highly negative enthalpy and highly positive entropy

Answer 1

Look at ΔG = ΔH - TΔS.

It turns out that a negative ΔH and a positive ΔS will always give you a negative ΔG and will be spontaneous.

So answer is

highly negative enthalpy and highly positive entropy