What are the 5 major factors that affect reaction rate?
Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants, and the …
What is the difference between EA and ∆ E?
-the reactants have some amount of potential energy embedded within them. The energy of activation (Ea) is the difference between… -the energy of the starting materials (the reactant) and the energy of the transition state (the top point/the middle) The energy change (Delta E) is the energy difference between…
What two conditions must be met in order for a collision to be effective?
Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. Molecules must collide with the proper orientation. A collision that meets these two criteria, and that results in a chemical reaction, is known as a successful collision or an effective collision.
Why do most collision fail to produce products?
In some cases the colliding molecules, or other particles, do not have appropriate orientation to one another in the collision to lead to a reaction. Reactants must have enough energy to overcome the activation energy barrier in order to become products.
How else can reaction rates be expressed?
The rate could be expressed in the following alternative ways: d[Z]/dt, –d[A]/dt, –d[B]/dt, dz/dt, −da/dt, −db/dt where t is the time, [A], [B], and [Z] are the concentrations of the substances, and a, b, and z are their amounts. Note that these six expressions are all different from one another but are simply related.
What is average and instantaneous rate of reaction?
The average rate is the change in concentration over a selected period of time. It depends on when you take the measurements. The instantaneous rate is the rate at a particular time. It is determined by finding the slope of the tangent to the concentration vs time curve at that time.
Why does increasing the concentration of reactants cause the reaction rate to increase too quizlet?
If the concentration of reactants is increased, there are more reactant particles moving together. There will be more collisions and so the reaction rate is increased. The higher the concentration of reactants, the faster the rate of a reaction will be.
What factors can affect the rate of a chemical reaction quizlet?
5 Factors Affecting the Rate of Reaction
- Nature of Reactants.
- Surface Area (more = faster)
- Temperature (higher = faster)
- Concentration (larger = faster)
- Catalyst (present = faster)
What are 4 ways to increase the rate of a chemical reaction?
There are 4 methods by which you can increase the rate of a reaction:
- Increase the concentration of a reactant.
- Increase the temperature of the reactants.
- Increase the surface area of a reactant.
- Add a catalyst to the reaction.