Question

Which of the following statements is true?

(a) An exothermic reaction will slow down when heated.

(b) The rates of all chemical reactions increase with temperature.

(c) Heating the reactants in an exothermic reaction causes the system to attain a state of equilibrium.

(d) Only exothermic reactions proceed spontaneously at room temperature.

Answer 1

Answer: A

Explanation: An exothermic reaction generates heat. Unless the reaction is cooled in some way, its temperature increases. If you increase the temperature with an external heater, it slows the reaction down or reverse its direction.