How does temperature increase affect collisions between molecules?

Answer 1

The number of collisions with enough energy to react increases.

Answer 2

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.

Answer 3

generally heat of reaction is defied as the enthalpy chage of a reaction.

so it should be directly proprtional.

Answer 4

the number of molecules with sufficient energy to react increases

Answer 5

It increases the number of high-energy collisions.

Answer 6

Increasing temperature causes the particles to move more rapidly and have a greater kinetic energy - the rate of particle collisions is therefore increased.