<Ul> <Li> When ΔS> 0 and ΔH <0, the process is always spontaneous as written . </Li> <Li> When ΔS <0 and ΔH> 0, the process is never spontaneous, but the reverse process is always spontaneous . </Li> <Li> When ΔS> 0 and ΔH> 0, the process will be spontaneous at high temperatures and non-spontaneous at low temperatures . </Li> <Li> When ΔS <0 and ΔH <0, the process will be spontaneous at low temperatures and non-spontaneous at high temperatures . </Li> </Ul> <Li> When ΔS> 0 and ΔH <0, the process is always spontaneous as written . </Li> <Li> When ΔS <0 and ΔH> 0, the process is never spontaneous, but the reverse process is always spontaneous . </Li> <Li> When ΔS> 0 and ΔH> 0, the process will be spontaneous at high temperatures and non-spontaneous at low temperatures . </Li>

When is a reaction said to be spontaneous