Why matter can react?
many factors cause. The following is an explanation of what influences the speed of reaction.
A. CONCENTRATION
Concentration big influence on the reaction. From various experiments showed that the greater the concentration of the substance - a substance that reacts cepatuntuk will increasingly take place. This is because the greater concentration of more and more substances which react so the greater like lihood of collision is thus the greater the likelihood of a reaction.
B. NATURE OF SUBSTANCES THAT REACT
Easy to difficult nature of a substance to react will determine the course of the reaction rate.
In general it can be stated that:
-) Reactions among ions.
Reaction fellow ions will be easy to react because of the attractive forces between the ions opposite charge.
many factors cause. The following is an explanation of what influences the speed of reaction.
A. CONCENTRATION
Concentration big influence on the reaction. From various experiments showed that the greater the concentration of the substance - a substance that reacts cepatuntuk will increasingly take place. This is because the greater concentration of more and more substances which react so the greater like lihood of collision is thus the greater the likelihood of a reaction.
B. NATURE OF SUBSTANCES THAT REACT
Easy to difficult nature of a substance to react will determine the course of the reaction rate.
In general it can be stated that:
-) Reactions among ions.
Reaction fellow ions will be easy to react because of the attractive forces between the ions opposite charge.
example :
This reaction takes place quickly.
-) Reaction for covalent compounds
This reaction was slow due to ongoing reaction takes energy to break bonds - covalent bonds in the molecule contained a substance that reacts.
-) Reaction for covalent compounds
This reaction was slow due to ongoing reaction takes energy to break bonds - covalent bonds in the molecule contained a substance that reacts.
example :
This reaction is slow reaction can be speeded up if given the energy of sunlight for example.
C. TEMPERATURE
In general the reaction will go faster when the temperature is raised. By raising the temperature of the kinetic energy of the molecules of a substance that reacts to rise so that more molecules have energies equal to or greater than Ea. Thus more molecules can reach the transition state or in other words the reaction rate becomes larger. Mathematically the relationship between the value of the reaction rate constant (k) to temperature is expressed by the formulation arhenius:
C. TEMPERATURE
In general the reaction will go faster when the temperature is raised. By raising the temperature of the kinetic energy of the molecules of a substance that reacts to rise so that more molecules have energies equal to or greater than Ea. Thus more molecules can reach the transition state or in other words the reaction rate becomes larger. Mathematically the relationship between the value of the reaction rate constant (k) to temperature is expressed by the formulation arhenius:
| k = A . e-E/RT |
Where :
k : reaction rate constant
A : the price is a typical Arrhenius constants for each reaction
E : activation energy
R : universal gas constant = 0.0821.atm/moloK = 8314 joules / moloK
T : reaction temperature (OK)
D. Catalyst
A : the price is a typical Arrhenius constants for each reaction
E : activation energy
R : universal gas constant = 0.0821.atm/moloK = 8314 joules / moloK
T : reaction temperature (OK)
D. Catalyst
A catalyst is a substance added to a reaction with the intention of enlarging the speed of reaction. Catalysts are sometimes involved in the reaction but not a permanent chemical change, in other words at the end of the reaction the catalyst will be found back in shape and the same number as before the reaction.
Its function is to increase the speed of reaction catalysts (speed up the reaction) by decrease the activation energy of a reaction and the formation stages of a new reaction. By decreasing the activation energy at the same temperature then the reaction can take place more quickly.
Its function is to increase the speed of reaction catalysts (speed up the reaction) by decrease the activation energy of a reaction and the formation stages of a new reaction. By decreasing the activation energy at the same temperature then the reaction can take place more quickly.
E. PRESSURE
In general, where the pressure is increased then the reaction that occurs will also be faster as well. This is because if the substance in the press and the substance - the substance will be easy to close
Tidak ada komentar:
Posting Komentar