Table of Contents
Why might we want to decrease the rate of a reaction?
The reaction rate decreases with a decrease in temperature. Catalysts can lower the activation energy and increase the reaction rate without being consumed in the reaction. Differences in the inherent structures of reactants can lead to differences in reaction rates.
What are two factors that decrease the reaction rate?
Lesson
- surface area of a solid reactant.
- concentration or pressure of a reactant.
- temperature.
- nature of the reactants.
- presence/absence of a catalyst.
Why does the rate of the reaction decrease over time quizlet?
Why does the rate of reactants decrease over time? The concentration reactants is generally really high, so there are many collisions between the reactant particles. As the reactant particles get used up and there are fewer collisions the rate of foward reaction slows down.
Does decreasing the surface area increase or decrease the rate of reaction?
If the surface area of a reactant is increased: more particles are exposed to the other reactant. there is a greater chance of particles colliding, which leads to more successful collisions per second. the rate of reaction increases.
What can reduce the rate of reaction?
Perhaps the most obvious answer is to decrease the temperature of the reaction: this slows down the particles and, thus, reduces the likelihood of successful collisions between the reactant particles.
Which reaction is faster Why?
Reactions in phases that easily mix, such as gases and liquids, occur much faster than reactions between solids. The extent of mixing of the reactants influences the frequency of molecular collisions – if reactants are more thoroughly mixed, the molecules will collide more often and thus react faster..
What will increase reaction rate?
temperature
In general, increasing the concentration of a reactant in solution, increasing the surface area of a solid reactant, and increasing the temperature of the reaction system will all increase the rate of a reaction. A reaction can also be sped up by adding a catalyst to the reaction mixture.
Which affects the Gibbs free energy of a reaction quizlet?
The change in Gibbs Free Energy is equal to the change in Gibbs Free Energy of the reaction plus the product of the rate constant, temperature and the natural log of the reaction quotient. What affects Gibbs Free Energy, Enthalpy, and Entropy? Catalysts, Temperature, and Pressure.
Which does not affect the rate of reaction?
Nature and concentration of the reactants and temperature of the reaction influence the rate of reaction. But molecularity does not affect the rate of reaction as it includes the number of atoms, ions or molecules that must collide with one another to result into a chemical reaction.
What makes a reaction occur faster?
Increasing the number of collisions speeds up the reaction rate. The more reactant molecules there are colliding, the faster the reaction will be. In most simple cases, increasing the concentration of the reactants increases the speed of the reaction.