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How does a temperature increase cause the rate of a reaction to increase increase?
It increases the kinetic energy of the molecules (APEX)
Why does an increase reaction temperature generally increase the reaction rate?
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
What can increase the chance of a reaction when two molecules collide?
An increase in temperature, higher concentration of reactants, and the presence of a catalyst can increase the chance of a reaction when two molecules collide. These factors can provide additional energy to overcome the activation energy barrier, leading to more collisions resulting in a reaction.
What effect does raising the temperature have on the speed of reaction for the forward reaction and why?
In general, but not always, increasing the temperature will increase the rate of the forward reaction. This is because an increase in temperature increases the speed at which the molecules move, increasing the kinetic energy, and thus making it easier to reach the activation energy. Of course, this is true only for endothermic reactions. If the reaction is exothermic, then increasing the temperature will slow down the forward reaction.
What causes the concentration of the reactants to affect the reaction rate?
It increases the number of collisions at the right orientation.
How does a temperature increase cause the rate of a reaction to increase increase?
It increases the kinetic energy of the molecules (APEX)
Why does an increase reaction temperature generally increase the reaction rate?
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
What can increase the chance of a reaction when two molecules collide?
An increase in temperature, higher concentration of reactants, and the presence of a catalyst can increase the chance of a reaction when two molecules collide. These factors can provide additional energy to overcome the activation energy barrier, leading to more collisions resulting in a reaction.
How does this increase the rate of the reaction?
It increases the number of collisions between molecules. :)
How does a temperature increase affect collision between molecules?
The number of collisions with enough energy to react increases.
How factors affect rates of physical change?
-Reactant Concentration • The greater the concentration of reactants (the more particles per unit volume), the greater will be the number of effective collisions per unit time, and therefore, the reaction rate will generally increase. • For zero order reactions, however, the reaction rate is not dependent on the concentration of reactants. Increasing the reactant concentration will have no effect on the rate. -Temperature • The reaction rate will increase as the temperature of the system increases. As the temperature increases, the reactant molecules have more energy. They thus find it easier to climb the energy barrier to the reaction (the activation energy). -Solvent • The reaction rate will increase as the temperature of the system increases. As the temperature increases, the reactant molecules have more energy. They thus find it easier to climb the energy barrier to the reaction (the activation energy).
What changes of temperature on rate of reaction?
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.
According to kinetic and collision theory why does increasing the temperature of the reaction increase the rate of reaction?
Increasing the temperature of a reaction increases the average kinetic energy of the molecules involved. This results in more frequent and energetic collisions between the molecules, leading to a higher probability of successful collisions that result in a reaction. In essence, increasing the temperature increases both the number of collisions and the proportion of collisions that have enough energy to overcome the activation energy barrier.
What effect does raising the temperature have on the speed of reaction for the forward reaction and why?
In general, but not always, increasing the temperature will increase the rate of the forward reaction. This is because an increase in temperature increases the speed at which the molecules move, increasing the kinetic energy, and thus making it easier to reach the activation energy. Of course, this is true only for endothermic reactions. If the reaction is exothermic, then increasing the temperature will slow down the forward reaction.
Does temperature of a gas increase or decrease under pressure?
When pressure on a gas increases, its temperature also increases. This relationship is described by the ideal gas law (PV = nRT), showing that an increase in pressure leads to an increase in temperature to maintain the same volume and number of moles of gas.
What causes the concentration of the reactants to affect the reaction rate?
It increases the number of collisions at the right orientation.
What is a main reason that an increase in temperature increases the rate of a chemical reaction?
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.
