12.1 Thermodynamics and Bioenergetics [HY] Flashcards
1
Q
When are biological systems open?
A
When matter and energy can be exchanged with the
environment.
2
Q
When are biological systems closed?
A
When only energy can be exchanged with the
environment.
3
Q
How is energy exchanged?
A
In the form of mechanical work when something is moved or as heat energy.
4
Q
How is matter exchanged?
A
Through food consumption, elimination and respiration.
5
Q
What is Enthalpy?
A
The overall change in heat of a system during a reaction.
6
Q
What is Entropy?
A
The degree of disorder or energy dispersion in system.
7
Q
When a system is closed what can you assume?
A
change in enthalpy = change in internal energy = heat exchange within environment
8
Q
Is work performed on a closed biological system?
A
No, because pressure and volume stay constant.
