Respuesta :
Answer:
The first he answered is correct the second question is : negative enthalpy and positive entropy changes
Explanation:
The products have lower potential energy than the reactants, and the enthalpy change is negative and negative enthalpy and positive entropy changes require to be spontaneous at all temperatures.
What is exothermic reaction?
Those reactions in which release of heat or energy observed is known as exothermic reaction.
For exothermic reaction value of change in enthalpy is calculated as:
Change in enthalpy = Enthalpy of product - Enthalpy of reactant
- Value of ΔH for the exothermic reaction is always negative as energy is released in the environment, so for this it is necessary to have the potential energy of product is less as compare to the potential energy of reactant.
- And any spontaneous reaction are those which can be completed without any external input, so for the spontaneity also ΔH of any reaction should be negative and Change in entropy should be positive; as it gives idea about the random arrangement of atoms or molecules. Therefore positive value of entropy indirectly defines the stability of the product.
Hence, for the exothermic reaction: The products have lower potential energy than the reactants, and the enthalpy change is negative and negative enthalpy and positive entropy changes show spontaneity.
To know more about exothermic reaction, visit the below link:
https://brainly.com/question/2924714
