Which of the following factors affect the rate of a reaction by increasing the frequency of effective collisions between reactant particles?Select one:a.temperature and pressureb.concentration and pressurec.pressure and catalystd.concentration and catalyst
Question
Which of the following factors affect the rate of a reaction by increasing the frequency of effective collisions between reactant particles?Select one:a.temperature and pressureb.concentration and pressurec.pressure and catalystd.concentration and catalyst
Solution
The factors that affect the rate of a reaction by increasing the frequency of effective collisions between reactant particles are:
a. Temperature: Increasing the temperature increases the kinetic energy of the particles, causing them to move faster and collide more frequently. These collisions are also more likely to be effective because the particles have more energy.
b. Concentration: Increasing the concentration of the reactants increases the number of particles in a given volume. This increases the likelihood of collisions between reactant particles.
c. Pressure: Increasing the pressure decreases the space between particles, which can increase the frequency of collisions. However, this primarily affects reactions involving gases.
d. Catalyst: A catalyst lowers the activation energy required for a reaction to occur, which can increase the rate of reaction. However, it does not necessarily increase the frequency of collisions.
So, the correct answer is d. Concentration and Catalyst.
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