Below are five statements about the temperature dependence of a reaction rate constant K. Which one statement holds true for most chemical reactions?
1) increases with temperature, mainly because there are fewer collisions per second.
2) increases with temperature, mainly because a higher proportion of the collisions are energetic enough to produce reaction.
3) decreases with temperature, mainly because of the decrease in effectiveness of the attractive long-range intermolecular forces.
4) does not change with temperature.
5) increases or decreases with temperature, depending on whether the reaction is endothermic or exothermic.