Chemical Systems Flashcards
1
Q
System
A
A chemical reaction
2
Q
Open system
A
Energy + matter can move between system + surroundings
3
Q
Closed system
A
Only energy can be exchanged. Matter cannot move
4
Q
Exothermic
A
Chemical system that RELEASES energy into its surrondings
5
Q
Endothermic
A
Chemical system that ABSORBS energy from its surroundings
6
Q
Reversible system
A
Can occur in two directions.
E.g. Melting choclate/ice
7
Q
Irreversible system
A
Can only occur in one direction.
E.g. Fried egg
8
Q
Equilibrium
A
When mass of reactants + products remain unchanged
9
Q
Unachievable in:
A
Open system
10
Q
Reversible examples
A
- Evaporation +condensation of water
- Saturated sugar solution
- Oxyhaemoglobin
