The number of collisions with enough energy to react increases.
Increasing the temperature generally increases the speed with which molecules move -- this is especially true in the gas phase. Because many reactions require that two molecules collide with each other, the faster the molecules move, the more collisions per second they will undergo. All else being equal, that translates to a faster reaction rate. The other main importance of a higher temperature is the additional energy molecules have which can be used to surmount the activation energy -- the energy barrier which must be overcome in order for the reaction to occur. At higher temperatures, molecules have high internal energy, and this internal energy can make bond-breaking processes faster, for instance.
See the Related Questions links below for more information about what affects the rate of a chemical reaction.
generally heat of reaction is defied as the enthalpy chage of a reaction.
so it should be directly proprtional.
the number of molecules with sufficient energy to react increases
It increases the number of high-energy collisions.
Increasing temperature causes the particles to move more rapidly and have a greater kinetic energy - the rate of particle collisions is therefore increased.
It provides energy to overcome the activation energy.
The great the density the higher the air pessure.
The atoms have greater kinetic energy and move faster when the temperature is raised, resulting in more frequent contact between the magnesium atoms and acid molecules, which will cause the rate of the reaction to increase.
Thr number of collisions between solute and solvent molecules is increased.
It increases the number of collisions between molecules.
It provides energy to overcome the activation energy.
It increases the number of collisions between molecules. :)
thermal effect
heating, stirring, surface area
The number of collisions with enough energy to react increases.
The great the density the higher the air pessure.
The atoms have greater kinetic energy and move faster when the temperature is raised, resulting in more frequent contact between the magnesium atoms and acid molecules, which will cause the rate of the reaction to increase.
Thr number of collisions between solute and solvent molecules is increased.
More collisions between particles of matter means a faster reaction rate. When you increase the kinetic energy of a sample of matter, you increase the number of particle collisions, as well as the force with which they collide. This in turn increase the rate of reaction.
It increases the number of collisions between molecules.
All chemical reactions must be thought of as collisions between the particles of reactants and products. As the temperature of the reaction increases, the energy of the particles also increases and so there is a greater chance of more collisions occuring, and as a result, in general, an increase in reaction temperature increases the reaction rate
The rate of reaction increases with increasing temperature. When the temperature is increased, the kinetic energy of the reacting particles hence the frequency of effective collisions are also increased. Hence the rate of reaction is faster.