When the system was at equilibrium, there was no net reaction. Now that the equilibrium is disturbed, there will be a net reaction in the direction of reactants or products (depends on the specifics of how the equilibrium was disturbed). The jargon for this net reaction is to say the equilibrium “shifted to the left” (or to the right).

2019年1月12日 · The term "equilibrium shifting" is mostly used for a reaction that was already at equilibrium, but we changed something (in the simplest case adding one reactant or product to the equilibrium mixture so the reaction is no longer at equilibrium).

2019年11月19日 · In chemistry, and in physics, a dynamic equilibrium exists once a reversible reaction occurs. Substances transition between the reactants and products at equal rates, meaning there is no net change. Reactants and products are formed at such a rate that the concentration of neither changes.

2016年1月4日 · According to IUPAC: Quantities, Units and Symbols in Physical Chemistry, the arrows are used differently for composite mechanisms in chemical kinetics. In case of a simple mechanism that is composed of a forward and a reverse elementary reaction (i.e. reactions that occur at the molecular level in one step), it is conventional to write these in ...

2019年1月3日 · Examples where equilibrium constant are clearly treated as having dimensions is for the dissociation constant Kd used in biochemistry, or in converting Kc to Kp. The way you make equilibrium constant dimensionless is to use dimensionless measures of …

2016年3月2日 · For a reaction to be in equilibrium, the concentrations of reactants and products must be related by the equilibrium constant. $$ \ce{ A <=> B} $$ $$ K = \frac{[B]}{[A]} $$ When equilibrium constants are extremely large or small, then extremely large numbers of molecules are required to satisfy this equation.

2024年12月14日 · While studying equilibrium, I came across this question-CO(g) + 2H₂(g) ⇌ CH₃OH(g) Hydrogen gas is introduced into a 5-L flask at 327°C, containing 0.2 mol of CO(g) and a catalyst, until the pressure is 4.92 atm. At equilibrium, 0.1 mol of CH₃OH(g) is formed. If the value of Kp = β/(4.92)^2. What is the value of β?

2017年5月28日 · The equilibrium constant expression is correct even if the reaction has a mechanism more complex than a single elementary reaction. One more aspect is the unit of the equilibrium constant. Rate equations are based on concentrations (units mol/L) while equilibrium constants are based on activities (dimensionless).

First case is not an equilibrium, but it's true that the reaction can go both directions using the appropriated reagents in each case. But that could not be expressed using $⇌$. The second reaction is an equilibrium, both reactions are happening continuously under the same conditions. It also could be expressed using $⇄$.

2024年9月6日 · In order for a reaction to be at equilibrium, All species have to be present; All concentrations have to be constant; The forward and reverse rates have to be the same "In equilibrium" usually means that they are approaching equilibrium (unless we keep "messing with it", e.g. by adding or removing a species).