It depends if the reaction is endothermic (requires heat/energy) or is exothermic (requires no heat/energy and produces heat/energy). In general, most reactions are endothermic and require some amount of energy to 'go' and hence, an increase in temperature will increase the rate of reaction. However, in exothermic reactions, introducing heat can halt the reaction as well as reverse it, if said reaction is reversible.
The temperature of the system
The key factors that influence the rate of a chemical reaction are concentration of reactants, temperature, presence of a catalyst, surface area of reactants, and the nature of the reactants and products.
A catalyst can speed up the rate of a given chemical reaction by lowering the activation energy required for the reaction to occur. However, the catalyst does not change the total free energy from reactants to products.
Temperature can affect the length of time a reaction takes (reaction rate) because atomic and molecular activity are somewhat temperature dependent. Certainly the mobility of molecules, atoms or ions has a temperature component. The fact that something like dynamite may be packed in ice won't prevent an explosion if it is set off, but many, many chemical reactions have reaction rates that are temperature dependent. The applied chemistry of the preparation of food broadly exemplifies this phenomenon. In chemistry, the Arrhenius equation speaks directly to temperature dependence of a reaction. Indeed, temperature is a factor in particle behavior as is set down in Boltzman distribution. Links are provided for some further reading.
Temperature is the measure of the average kinetic energy of the molecules involved. If the temperature increases, then the kinetic energy of the molecules increases and they move faster. Faster moving molecules have more collisions with other molecules and more forcefully. For a reaction to occur, the molecules have to line up correctly and with adequate force. By increasing the speed of the particles, you are increasing the chance that the two molecules will align and produce a reaction.
In general, as temperature rises, so does reaction rate. This is because the rate of reaction is dependent on the collision of the reacting molecules or atoms. As temperature rises, molecules or atoms respond with increased motion, increasing the collision rate, thus increasing the reaction rate.
rate of a reaction can be increased by increasing the temperature if the reactor
Chemical reaction rate is increased by: -increased surface area -increased temperature -increased concentration of reactants -presence of a catalyst Chewing food essentially breaks up large chunks of food into smaller bits, increased total surface area for digestion.
The reaction rate of a chemical reaction is dependent on temperature.
Increasing the temperature the dissolving rate increase.
yes.
Concentration, surface area, and temperature all affect the rate of chemical reactions. Increasing concentration increases the number of reactant particles colliding, larger surface area allows for more contact between reactants, and higher temperature provides more energy for particles to react.
The rate constant of a chemical reaction generally increases with temperature. This is because higher temperatures provide more energy for molecules to react, leading to a faster reaction rate.
The reaction rate is dependent on temperature (increasing the temperature the reaction rate increase) and activation energy.
Increasing the temperature will cause there to be an increase in kinetic energy. This results in an increase in collision frequency, and eventually an increase in rate of reaction as well.
The rate constant of a chemical reaction generally increases with temperature. This is because higher temperatures provide more energy for molecules to react, leading to a faster reaction rate.
Increased concentration, increased temperature, and a catalyst will all increase reaction rates relative to what they normally are. Some reactions however will still be slow even with the change in these variables.