(02.04 lc) which of the following most likely causes the particles in a chemical reaction to slow down? (5 points) select one: a. raising the thermal energy of the particles b. increasing the rate of the reaction c. lowering the temperature d. adding heat to the reaction

The rate of a chemical reaction depends on several factors which include:

1) Concentration of the reactants

2) Pressure (in case of gases)

3) Temperature

4) Catalyst

As molecules approach each other, they collide forming a transition state which then unravels to form the product. As the temperature is lowered the frequency of molecular collisions gets reduced which causes the reaction to slow down.

Ans C) Lowering the temperature

Option (c) is the correct answer.

Explanation:

Thermal energy is defined as the internal energy holded by the particles of a substance because of their kinetic energy.

When we raise thermal energy of the particles then it means there will be increase in kinetic energy of particles. As a result, collisions will increase that will lead to increase in rate of reaction.

When rate of reaction is increase then it means particles are moving much more rapidly. This causes rapid formation of products.

When we lower the temperature of a chemical reaction then there will be decrease in kinetic energy of molecules. As a result, less number of collisions will occur. Hence, rate of reaction will slow down.

Also, when we add heat to a reaction then bond between the particles will break and hence molecules gain kinetic energy. Due to this again collisions will increase. Hence, rate of reaction will also increases.

Therefore, we can conclude that lowering the temperature will most likely causes the particles in a chemical reaction to slow down.

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