Click to read full answer. Simply so, how do you know if a reaction is spontaneous or Nonspontaneous?
A spontaneous reaction is a reaction that occurs in a given set of conditions without intervention. Spontaneous reactions are accompanied by an increase in overall entropy, or disorder. If the Gibbs Free Energy is negative, then the reaction is spontaneous, and if it is positive, then it is nonspontaneous.
Similarly, does temperature affect the spontaneity of a reaction? Since all temperature values are positive in the Kelvin scale, the temperature affects the magnitude of the entropy term. If ΔH is positive, and –TΔS negative, the reaction will be spontaneous at high temperatures (increasing the magnitude of the entropy term).
Considering this, in which case must a reaction be spontaneous at all temperatures?
When ΔS < 0 and ΔH > 0, the process is never spontaneous, but the reverse process is always spontaneous. When ΔS > 0 and ΔH > 0, the process will be spontaneous at high temperatures and non-spontaneous at low temperatures.
What are the conditions for a spontaneous reaction?
Conditions for spontaneity. So the two conditions for a reaction to be spontaneous are: tendency to achieve minimum energy. tendency to achieve maximum randomness.
