Unit 2 Leason 1 Flashcards
1
Q
Thermochemistry
A
The study of energy changes involved in chemical and physical changes in matter
2
Q
Temperature (T)
A
The average kinetic energy of the particles in a sample measured in degrees Celsius or kelvin.
3
Q
Heat (Q)
A
Amount of energy that enters or leaves a substance measured in joules
4
Q
System and surrounding
A
System: Any sample under observation
Surrounding: anything else in the universe
5
Q
Open system
A
Can exchange both energy and matter with the surrounding
6
Q
Closed system
A
can only exchange energy
7
Q
Isolated system
A
Cannot exchange energy or matter
