What happens when there is an increase in temperature for a reaction rate?
Select all that apply.
It increases the chance that the reaction will be endothermic
It increases the percentage of collisions that result in a reaction
It increases the total number of molecular collisions that occur (correct)
just tell us bruh
When there is an increase in temperature for a reaction rate, it increases:
1. The percentage of collisions that result in a reaction: Increasing the temperature increases the kinetic energy of molecules, which leads to more frequent and energetic collisions. This increases the chances of successful collisions and thus increases the percentage of collisions that result in a reaction.
2. The total number of molecular collisions that occur: Higher temperature also increases the average speed of molecules, leading to an increase in the total number of collisions happening between reactant molecules. This, in turn, increases the rate of the reaction.
It does not increase the chance that the reaction will be endothermic. The nature of a reaction, whether it is exothermic or endothermic, is determined by the difference in energy between reactants and products and is unaffected by temperature changes.
To determine what happens when there is an increase in temperature for a reaction rate, we need to consider the effect of temperature on the kinetic energy of molecules and the collision theory.
1. It increases the chance that the reaction will be endothermic: This statement is incorrect. The increase in temperature does not directly affect whether a reaction is endothermic or exothermic. The nature of a reaction being endothermic or exothermic is determined by the enthalpy change during the reaction.
2. It increases the percentage of collisions that result in a reaction: This statement is correct. Increasing the temperature provides more kinetic energy to the molecules, causing them to move faster and collide more frequently. The increased energy also increases the chances of successful collisions leading to a reaction.
3. It increases the total number of molecular collisions that occur: This statement is correct. As mentioned earlier, an increase in temperature increases the kinetic energy of molecules, which leads to higher molecular velocities. The increased velocities result in more frequent collisions between molecules, increasing the total number of molecular collisions that occur.
Therefore, the correct statements from the options provided are:
- It increases the percentage of collisions that result in a reaction
- It increases the total number of molecular collisions that occur.