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What factors determine whether a collision between two molecules will lead to chemical reaction?
Wiki User
∙ 9y ago
Concentration of Reactants
A higher concentration of reactants leads to more effective collisions per unit time, which leads to an increasing reaction rate (except for zero order reactions). Similarly, a higher concentration of products tends to be associated with a lower reaction rate. Use the partial pressure of reactants in a gaseous state as a measure of their concentration.
Temperature
Usually, an increase in temperature is accompanied by an increase in the reaction rate. Temperature is a measure of the kinetic energy of a system, so higher temperature implies higher average kinetic energy of molecules and more collisions per unit time. A general rule of thumb for most (not all) chemical reactions is that the rate at which the reaction proceeds will approximately double for each 10°C increase in temperature. Once the temperature reaches a certain point, some of the chemical species may be altered (e.g., denaturing of proteins) and the chemical reaction will slow or stop.
Medium
The rate of a chemical reaction depends on the medium in which the reaction occurs. It may make a difference whether a medium is aqueous or organic; polar or nonpolar; or liquid, solid, or gaseous.
Presence of Catalysts and Competitors
Catalysts (e.g., enzymes) lower the activation energy of a chemical reaction and increase the rate of a chemical reaction without being consumed in the process. Catalysts work by increasing the frequency of collisions between reactants, altering the orientation of reactants so that more collisions are effective, reducing intramolecular bonding within reactant molecules, or donating electron density to the reactants. The presence of a catalyst helps a reaction to proceed more quickly to equilibrium. Aside from catalysts, other chemical species can affect a reaction. The quantity of hydrogen ions (the pH of aqueous solutions) can alter a reaction rate. Other chemical species may compete for a reactant or alter orientation, bonding, electron density, etc., thereby decreasing the rate of a reaction.
Um... if you speak english, could you reword this?
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoEnergy and orientation.
When the collision is hard and fast enough. Increasing the kinetic energy will increase the likelihood of hard and fast collisions, which will ultimately increase the rate of the reaction. (This is called collision theory.)
Wiki User
∙ 10y agoThere are 3 big factors that I can think off the top of my head. Temperature; the higher the temp, the more excited the molecules, and also convection currents allow more rapid movement, volume of solution/concentration; The more concentrated the reactants, the higher probability of a molecule meeting another, and whether stirring is incorporated or not; thus causing enhanced mass transfer.
Wiki User
∙ 10y agooriented collision and energy collision
-Alex
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Why does heat speed up a chemical reaction?
It provides energy to overcome the activation energy.
Will a chemical reaction in different molecules trade positions with exchange reaction?
An exchange reaction is defined as a chemical reaction in which two different molecules or pairs of molecules exchange places. So yes, a chemical exchange reaction will result in different molecules trading positions.
Can a chemical reaction with different molecules trade positions with decomposition?
Decomposition is its own category of chemical reaction. A reaction in which different molecules trade positions is known as an exchange reaction, as pairs of molecules essentially exchange places with one another.
Why is a fruit rotting a chemical?
It's a chemical REACTION. Because molecules are being changed into other molecules.
According to modern chemistry what causes chemical reactions?
A chemical reaction is caused by two compounds colliding. This happen with certain amount of force.
Molecules involved in a chemical reaction must collide to react What is this concept called?
Collision Theroy
How are reactant elements or molecules different than the compound produced in a chemical reaction?
reactant elements and molecules are used in a chemical reaction, they are not mixed or combined or produced in a chemical reaction.
What is an activation site?
An active or activation site is a small opening in an enzyme where substrate molecules are bound, and go through a chemical reaction. This reaction is caused by the collision a substrate that slots into the active site of the enzyme.
Why does heat speed up a chemical reaction?
It provides energy to overcome the activation energy.
What happens durring a chemical reaction?
During any chemical reaction there will be a spontaneous motion of each atoms/ molecules, and all atoms/ molecules collides with each other, on each collision there will be a microscopic interaction, and, there will be a rearrangement in electronic configuration when a low energy or "symmetry" can be obtained. Due to this reconfiguration the spatial arrangement and motion of atoms/molecules changes which is what we observe.
What reactants are in chemical reaction?
The elements or molecules that participate in a chemical reaction and yield a product.
What is collision model?
A Collision model is a model of the rate of a reaction showing how the rate is proportional to the number of collisions of reactant molecules.
Will a chemical reaction in different molecules trade positions with exchange reaction?
An exchange reaction is defined as a chemical reaction in which two different molecules or pairs of molecules exchange places. So yes, a chemical exchange reaction will result in different molecules trading positions.
Does decomposition have chemical reactions with different molecules trade position?
A decomposition reaction does not involve molecules trading positions. When two different molecules or pairs of molecules change position with one another, the chemical reaction is known as an exchange reaction.
Can New molecules be created in a chemical reaction?
No
Can a chemical reaction with different molecules trade positions with decomposition?
Decomposition is its own category of chemical reaction. A reaction in which different molecules trade positions is known as an exchange reaction, as pairs of molecules essentially exchange places with one another.
The process by which digestive enzymes catalyze the breakdown of larger molecules to smaller molecules with the addition of water is known as?
The reaction would be termed a chemical reaction.
