How would each of the following change the rate of the reaction shown here?
Drag the appropriate items to their respective bins.
Reaction rate increases, Reaction rate decreases, or Reaction rate remains the same
decreasing the temperature
adding a catalyst
adding some NO (g)
removing some H2 (g)
decreasing the temperature: Reaction rate decreases
adding a catalyst: Reaction rate increases
adding some NO (g): Reaction rate increases
removing some H2 (g): Reaction rate decreases
- Decreasing the temperature: Reaction rate decreases. Lowering the temperature usually slows down the rate of chemical reactions.
- Adding a catalyst: Reaction rate increases. Catalysts increase the rate of reaction by providing an alternative reaction pathway with lower activation energy.
- Adding some NO (g): Reaction rate increases. NO (nitric oxide gas) can act as a catalyst or a reactant in some reactions, speeding up the overall reaction rate.
- Removing some H2 (g): Reaction rate remains the same. Removing a reactant does not directly affect the rate of reaction. However, if the reaction is dependent on the concentration of H2, the rate will eventually decrease as the concentration decreases.
To determine how each of the given factors would change the rate of the reaction, we need to understand their effects on reaction rate. Let's analyze each factor one by one:
1. Decreasing the temperature: When the temperature is reduced, the reaction rate typically decreases. This is because lower temperatures result in slower molecular motion, leading to fewer successful collisions between reacting particles. Thus, the correct bin for this factor is "Reaction rate decreases."
2. Adding a catalyst: Catalysts are substances that increase the rate of a chemical reaction by providing an alternative reaction pathway with a lower activation energy. By doing so, catalysts enable more effective collisions and enhance the rate of the reaction. Therefore, the correct bin for this factor is "Reaction rate increases."
3. Adding some NO (g): The effect of adding NO to the reaction depends on the specific reaction and the role of NO in it. If NO participates as a reactant and is required for the reaction to occur, then its addition would potentially increase the reaction rate. On the other hand, if NO acts as an inhibitor or does not play a significant role in the reaction, its addition may have little or no effect on the rate. Hence, without more information about the reaction and the role of NO, it is difficult to determine its effect accurately. Consequently, the correct bin for this factor in the given context is "Reaction rate remains the same."
4. Removing some H2 (g): Removing a reactant, such as H2 in this case, would typically lead to a decrease in the reaction rate. This is because the concentration of H2 decreases, resulting in fewer collisions between H2 and the other reactants. Consequently, the correct bin for this factor is "Reaction rate decreases."
In summary, the rate of the reaction shown would decrease when the temperature is decreased and H2 is removed. The rate would increase with the addition of a catalyst. However, without more information about the role of NO in the reaction, it is not possible to determine its effect accurately.