Start dropping solvent dipoles into an electrical potential well. There's more going on than just entropy of mixing.Conservation said:how is this possible when dissolution is usually an increase in entropy?
Enthalpy? Again, you mean "entropy?" It's the integral of Cp/T from absolute zero to 298 K (or whatever T for the table).Conservation said:elements always having a positive standard enthalpy?
Standard entropy values can be negative because they are calculated based on the change in entropy between reactants and products in a reaction. If the products have a lower entropy than the reactants, the change in entropy will be negative, resulting in a negative standard entropy value.
Yes, negative standard entropy values can occur in all types of reactions, including physical and chemical reactions. It is a result of the change in entropy between the initial and final states of the reaction.
Negative standard entropy values indicate that the reaction results in a decrease in randomness or disorder. This decrease in entropy can make the reaction less spontaneous, but other factors such as temperature and pressure also play a role in determining the spontaneity of a reaction.
Yes, there are some exceptions where a negative standard entropy value may not necessarily indicate a decrease in entropy. For example, some reactions may have a decrease in entropy but a positive standard entropy value due to other factors such as an increase in the number of moles of gas.
Negative standard entropy values can affect the equilibrium constant of a reaction by decreasing its value. This is because the change in entropy is included in the calculation of the equilibrium constant, and a negative value will result in a smaller equilibrium constant.