CH-1682
Temperature and rate
Chemistry · Secondary 4 · Medium · Temperature and rate
A student measures the initial rate of reaction between magnesium ribbon and excess dilute hydrochloric acid at two different temperatures.
Which change explains why the rate is higher at 50°C than at 25°C?
Which change explains why the rate is higher at 50°C than at 25°C?
- Particles collide more frequently and with more energy
- Particles have lower activation energy
- Concentration of acid is higher at 50°C
- Surface area of magnesium increases at 50°C
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