rate of reaction

• name the four factors that affect the rate of reaction

  1 - concentration

  2 - catalyst

  3 - particle size

  4 - temperature
• what causes a chemical reaction to take place?

  collision of particles
• whats the name of a reaction that releases heat energy?

  Exothermic reaction
• whats the name of a reaction that takes in heat energy?

  Endothermic reaction
• what unit is used for rate of reaction?

  cm$^3$s$^{-1}$