The difference between K and Q is that, K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage of a reaction.
The Nernst equation is used in calculating the equilibrium constant. At equilibrium Q = K. Substituting in K for Q, and the values for R, T, and F, we get: Example: Find the value of the equilibrium constant at 25oC for the cell reaction for the following electrochemical cell: Cu | Cu2+(1 M) || Ag+(1 M) | Ag.
Re: Kc vs Kp vs Q [ENDORSED] When this is the case and all values are given in pressures, we use Kp, which is the equilibrium constant for pressure. So Kc for Concentration and Kp for Pressure. You use Q when you are unsure if a reaction is at equilibrium.
The reaction quotient (Q) measures the relative amounts of products and reactants present during a reaction at a particular point in time. The reaction quotient aids in figuring out which direction a reaction is likely to proceed, given either the pressures or the concentrations of the reactants and the products.
K is the symbol given to the equilibrium constant for a chemical reaction. The value of the equilibrium constant, K, for a given reaction is dependent on temperature.
So Kc for Concentration and Kp for Pressure. You use Q when you are unsure if a reaction is at equilibrium. Say for example you are in a lab and don't know how long a reaction takes. So you check after 15 minutes and take their concentrations to see if the reaction has reached equilibrium.
If the enthalpy of the reaction is negative, then you known that the reaction is exothermic, or is releasing energy in the form of heat. This means that and increase in temperature for an exothermic reaction will cause a decrease in K, leading to Q>K, and ending in a left shift in favor of reactants.
This is a very common Mexican expression. It comes from the infinitive andar = to walk. It has many meanings ranging from "hurry", "go ahead" , to "really?" or "you don't say" used as expressions of interest or surprise when someone is telling you a story.
The SPARTAN-III program was a secret project initiated by the Beta-5 Division of the Office of Naval Intelligence's Section-III in order to produce cheap and expendable super soldiers to fight for the survival of humanity and the United Nations Space Command's colonies.
A child with poor spatial awareness will tend to have difficulties with visual perception. Such a child may be clumsy, often bumping into things. He may stand too far away from or too close to objects. It may be difficult for a child with spatial awareness difficulties to master the act of writing.