Describe how the signs of delta H and delta S determine whether a reaction is sp
ID: 534567 • Letter: D
Question
Describe how the signs of delta H and delta S determine whether a reaction is spontaneous or nonspontaneous at constant temperature and pressure. Check all that apply. When delta H is negative and delta S is positive, reaction is spontaneous at all temperatures When delta H is positive and delta S is negative, reaction is spontaneous at al temperatures. When delta H is negative and delta S is positive, reaction is nonspontaneous at all temperatures. When delta H is positive and delta S is negative, reaction is nonspontaneous at all temperatures. When delta H and delta S are both positive, reaction is spontaneous at high temperatures (if delta H T middot delta S) When delta H and delta S are both positive, reaction is spontaneous at low temperatures (if delta H > T middot delta S) and nonspontaneous at high temperatures (if delta H |T middot delta S|) and nonspontaneous at high temperatures (if |delta H|Explanation / Answer
Recall that, deltaG = deltaH- TdeltaS,
the above equation is used throughout to justify the below statements.