Question

 A reaction takes place between two gases at 298 K. There are 2.0 moles of gas A and 3.0 moles of gas B. Which scenario would lower the collision frequency between gases as well as the rate of reaction between gases A and B?A)Increase the moles of gas B.B)Lower the temperature of the reaction to 250 K.C)Compress the gases into a smaller volume.D)Introduce a catalyst to the container.

Answer 1

Answer:

B)Lower the temperature of the reaction to 250 K.

Explanation:

Option B is correct. Lowering the temperature will decrease the kinetic energy of the gas molecules decreasing the frequency of collision and the rate of the reaction.

Option A is incorrect. Increasing the moles or the number of gas molecules of A and B will bring the gas molecules closer to each other, thus increasing the frequency of collision and the rate of the reaction.  

Option C is incorrect. Compressing the gas into a small volume will bring the gas molecules closer to each other, thus increasing the frequency of collision and the rate of the reaction.  

Option D is incorrect. A catalyst works by lowering the activation energy and thus increasing the frequency and orientation of the collision between gas molecules and thus increasing the rate of the reaction.  

Answer 2

Choice B I think, because if the temperature decreases the particles move slower due to less kinetic energy, and thus won't collide as frequently.