sc12, reversible reactions and equilibria (paper 1) Flashcards
1
Q
true or false: chemical reactions are reversible
A
true
2
Q
true or false: chemical reactions aren’t reversible
A
false
3
Q
what happens at equilibrium
A
- rate of forward reaction = rate of backward reaction
- the concentrations of the reacting substances stay constant
4
Q
true or false: chemical equilibrium is a dynamic equilibrium
A
true
5
Q
true or false: chemical equilibrium is not a dynamic equilibrium
A
false
6
Q
what happens at chemical equilibrium
A
- forward and backward reaction keep going
- they don’t stop at equilibrium
7
Q
true or false: in a closed system, a reversible reaction can reach equilibrium
A
true
8
Q
true or false: in a closed system, a reversible reaction can’t reach equilibrium
A
false
9
Q
describe what is meant by a closed system
A
a container where no reacting substances can enter or leave
