The concept of reaction rate
Answers are for parents and teachers.
1
In a 5 L vessel the amount of HI falls from 30 mol to 10 mol in 4 min. What is the average rate in mol/(L·min)?
1
2
In a 2 L vessel the concentration of a product rises from 0 to 1.5 mol/L in 30 s. What is the rate of formation in mol/(L·min)?
3
3
The rate is 2 mol/(L·min), the vessel is 4 L, Δn = 24 mol. How many seconds did the reaction last?
180
4
The concentration of a product grows at 0.5 mol/(L·min) and there is none at the start. After how many minutes does it reach 2 mol/L?
4
5
Coal dust burns much faster than a lump. Why? Explain in terms of particle collisions.
Dust has a very large surface, so there are many more collisions with oxygen particles.