The production of water proceeds according to the following equation:

[tex]\[ 2 H_2(g) + O_2(g) \rightarrow 2 H_2O(g) \][/tex]

Which describes a way to speed up the collisions between hydrogen and oxygen molecules to produce more water?

A. Use a less-intense source of heat on the reactants.
B. Maintain the same temperature of the reactants.
C. Place the reactants in a smaller container.
D. Reduce the concentration of the reactants.



Answer :

To understand how to speed up the chemical reaction between hydrogen and oxygen to produce water, we need to look at the factors that influence the rate of chemical reactions. These factors typically include temperature, concentration of reactants, surface area, and the presence of catalysts.

1. Use a less-intense source of heat on the reactants:
- Reducing the intensity of heat generally slows down the reaction rate because heat provides energy that helps molecules move faster and collide more frequently. So, this would likely decrease the rate of reaction, not increase it.

2. Maintain the same temperature of the reactants:
- Keeping the temperature constant will maintain the current reaction rate. It won't speed up the process since no additional energy is being provided to increase the frequency of molecular collisions.

3. Place the reactants in a smaller container:
- When the reactants are placed in a smaller container, their concentration increases because the same number of molecules occupy a smaller volume. This means that the frequency of collisions between hydrogen and oxygen molecules will increase, thereby speeding up the reaction rate.

4. Reduce the concentration of the reactants:
- Decreasing the concentration of the reactants reduces the likelihood of the molecules colliding with each other, which in turn slows down the rate of the reaction.

Given this analysis, the most effective method to speed up the collisions between hydrogen and oxygen molecules to produce more water is:

Place the reactants in a smaller container.

This increases the concentration of reactants, leading to a higher frequency of collisions and, therefore, an increased reaction rate.