collision
1.) The emission of heat and evolution of gas
-The example of this is the boiling of water. In boiling, a chemical reaction occurs. When the water is heated, the water boils if they already reach the boiling point that gives off water vapor. The reaction gives the product of water vapor which is a gas.
2.) The formation of precipitate
-When a solution of lead nitrate is poured into a solution of Potassium iodide a yellow precipitate of lead iodide is formed.
3.) Collision Theory
Illustration 1.2
-The following hypothetical chemical reaction illustrates the collision of the molecules of two gases, A2 and B2, to form another compound of AB.
- Furthermore, the colliding species must be oriented in a manner favorable to the necessary rearrangement of atoms and electrons. Thus, according to the collision theory, the rate at which a chemical reaction proceeds is equal to the frequency of effective collisions. Because atomic or molecular frequencies of collisions can be calculated with some degree of accuracy only for gases (by application of the kinetic theory), the application of the collision theory is limited to gas-phase reactions.
-If the molecules move slowly, there is little kinetic energy and so these molecules simply have in contact with each other but do not cause any reactions at all.
2 types of collisions:
Effective collision- A collision b/w two reactants with the appropriate orientation & with sufficient energy to overcome the activation energy barrier.
Ineffective Collision- A collision b/w two reactants with the inappropriate orientation & without sufficient energy that cannot overcome the activation energy barrier.
Reactions involving collisions between two species
It is pretty obvious that if you have a situation involving two species they can only react together if they come into contact with each other. They first have to collide, and then they may react. (The chances of all this happening if your reaction needed a
-The example of this is the boiling of water. In boiling, a chemical reaction occurs. When the water is heated, the water boils if they already reach the boiling point that gives off water vapor. The reaction gives the product of water vapor which is a gas.
2.) The formation of precipitate
-When a solution of lead nitrate is poured into a solution of Potassium iodide a yellow precipitate of lead iodide is formed.
3.) Collision Theory
Illustration 1.2
-The following hypothetical chemical reaction illustrates the collision of the molecules of two gases, A2 and B2, to form another compound of AB.
- Furthermore, the colliding species must be oriented in a manner favorable to the necessary rearrangement of atoms and electrons. Thus, according to the collision theory, the rate at which a chemical reaction proceeds is equal to the frequency of effective collisions. Because atomic or molecular frequencies of collisions can be calculated with some degree of accuracy only for gases (by application of the kinetic theory), the application of the collision theory is limited to gas-phase reactions.
-If the molecules move slowly, there is little kinetic energy and so these molecules simply have in contact with each other but do not cause any reactions at all.
2 types of collisions:
Effective collision- A collision b/w two reactants with the appropriate orientation & with sufficient energy to overcome the activation energy barrier.
Ineffective Collision- A collision b/w two reactants with the inappropriate orientation & without sufficient energy that cannot overcome the activation energy barrier.
Reactions involving collisions between two species
It is pretty obvious that if you have a situation involving two species they can only react together if they come into contact with each other. They first have to collide, and then they may react. (The chances of all this happening if your reaction needed a