contestada

Which statement about reaction rates is true?

A. A catalyst slows down the reaction rate.
B. Changing the surface area affects the reaction rate.
C. Changing the amount of reactants will not change the reaction rate.
D. Changing the temperature cannot speed up a reaction rate.

Respuesta :

quasarJose

B. Changing the surface area affects the reaction rate.

Explanation:

The surface area affects the reaction rates of chemical reactions. Exposed surface area proportionally affects the rate of a reaction.

  • For example, to speed up the rate of a reaction, it is advisable to grind the solid into a powdery form.
  • The powder exposes maximum surface for reaction of substances.
  • In a chemical reaction, a catalyst speeds up the reaction rate.
  • The amount of reactants is the concentration and it affects the rate of reaction.
  • Temperature speeds up reaction rates and it is directly proportional to the average kinetic energy of reacting particles.

Learn more:

Reaction rate https://brainly.com/question/3930233

#learnwithBrainly