Which of the following factors affects the collision rate of molecules in the gas phase?

• A. Type of chemical bonds in the molecules
• B. Temperature of the gas
• C. Color of the molecules
• D. Shape of the container

Answer: (B)

Verified step by step guidance

1. Understand that the collision rate of gas molecules depends on how often molecules collide with each other per unit time.
2. Recall that the collision rate is influenced by factors that affect molecular speed and number density, such as temperature and pressure.
3. Recognize that increasing the temperature increases the average kinetic energy of molecules, causing them to move faster and collide more frequently.
4. Note that the type of chemical bonds, color of molecules, and shape of the container do not directly affect the frequency of molecular collisions in the gas phase.
5. Conclude that among the given options, the temperature of the gas is the factor that affects the collision rate of molecules.