Reaction rate. Chemical equilibrium
Answers are for parents and teachers.
1
A concentration falls from 10 to 4 mol/l in 3 seconds. What is the rate?
2 mol/(l·s)
2
If γ = 3, by how many times does the rate rise when heated by 40 °C?
81
3
A reaction finishes in 64 minutes at 20 °C. If the rate rises 16 times, how long does it take?
4 minutes
4
Why does keeping food in a refrigerator slow the spoiling reactions?
At low temperature reaction rates fall.
5
In CO₂ + H₂ ⇌ CO + H₂O, which way does equilibrium shift if CO₂ is added?
To the right (towards the products).