Thermodynamics Flashcards
(7 cards)
1
Q
What is internal energy?
A
The sum of all the randomly distributed potential and kinetic energies of the particles that make up a substance
2
Q
What is internal energy of a system?
A
The sum of the potential and kinetic energies of a system
3
Q
Does every particle in the system have to possess the same ratio of potential and kinetic energy?
A
- No
- the ratio of the respective potential/kinetic energy components many be randomly distributed within a system
4
Q
What is the general relationship between the temperature of a system and its internal energy?
A
- there is a positive correlation between the average temperature of a system and the sum of its internal energy
5
Q
Why is there a pause in temperature increase when a substance is being heated to temperatures at which phase changes take place?
A
- when melting or evaporation occurs:
- intermolecular bonds are broken
- Energy is required to break bonds (latent heat of fu
6
Q
A
7
Q
A
