Increasing temperature typically affects reaction rate how?

Increasing temperature typically affects reaction rate how?

• A. Decreases the rate
• B. Increases reaction rate
• C. No effect
• D. Only affects rate when pressure changes

Answer: (B)

Raising temperature speeds up many reactions because molecules move faster, increasing how often they collide and, importantly, how energetic those collisions are. With higher temperature, the average kinetic energy rises, so a larger portion of collisions have enough energy to get over the activation barrier. This makes more successful collisions occur per unit time, so the reaction rate increases. This is why the idea that temperature decreases the rate or has no effect isn’t accurate for most reactions—the energy distribution shifts with heat, boosting reaction likelihood. The statement that temperature only affects rate if pressure changes is also misleading, because temperature directly influences molecular energy and collision dynamics, not just through changes in pressure.

Raising temperature speeds up many reactions because molecules move faster, increasing how often they collide and, importantly, how energetic those collisions are. With higher temperature, the average kinetic energy rises, so a larger portion of collisions have enough energy to get over the activation barrier. This makes more successful collisions occur per unit time, so the reaction rate increases.

This is why the idea that temperature decreases the rate or has no effect isn’t accurate for most reactions—the energy distribution shifts with heat, boosting reaction likelihood. The statement that temperature only affects rate if pressure changes is also misleading, because temperature directly influences molecular energy and collision dynamics, not just through changes in pressure.