What is the effect of increasing temperature on the rate of a chemical reaction?

• A. It decreases the reaction rate.
• B. It has no effect on the reaction rate.
• C. It generally increases the reaction rate.
• D. It causes the reaction to stop.

Answer: (C)

Increasing temperature generally increases the rate of a chemical reaction due to several factors related to molecular behavior. As temperature rises, the kinetic energy of molecules increases, leading to more frequent and energetic collisions between reactant molecules. This increase in energy enhances the likelihood that collisions will surpass the activation energy threshold—the minimum energy required for a reaction to occur—resulting in a greater probability of successful reactions.

Moreover, higher temperatures can also lead to an increase in the number of reactive collisions by promoting the breakdown of bonds and other forms of molecular interactions. The increased movement of molecules allows them to encounter one another more often and with sufficient energy to facilitate breaking and forming chemical bonds.

Therefore, the overall effect of increasing temperature on a chemical reaction is a general increase in reaction rate, making the selected answer accurate in the context of basic thermodynamics and chemical kinetics.