Respuesta :
As the reaction is non-spontaneous at room temperature and spontaneous at high so it is an endothermic reaction. The sign of the standard entropy change is positive, enthalpy change is positive.
A chemical reaction is nothing more than a chemical process that begins with a reactant and ends with the formation of a product that differs chemically from the reactant from which it originated.
Naturally occurring reactions are those that occurs without affecting outside entities. Non-spontaneous responses demand some a reaction must be caused by an external force. The given case is explained as follows: In the given case, the reaction is spontaneous only at high temperatures. This means that the reaction is nonspontaneous at room temperature.
The heating increases the disorders in the arrangement and the entropy is increased. The sign of the standard entropy change is positive for an endothermic process.
As the reaction is non-spontaneous at room temperature and spontaneous at high so it is an endothermic reaction. For endothermic reaction, the value of the enthalpy change is greater than zero that is
ΔH>0.
That is the value of the enthalpy change is positive.
The sign of the standard entropy change for an exothermic reaction is negative because for an exothermic reaction the entropy of the system decreases.
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