Calorimetry and Phase Changes Flashcards
1
Q
- the science of measuring changes in parameters of chemical reactions, physical changes, and ohase transitions
- “measuring heat”
A
Calorimetry
2
Q
Qcan + Qwater + Qobj. = ______
A
0
3
Q
if heat is gained, Q is _____
A
positive
4
Q
if heat is lost, Q is _____
A
negative
5
Q
” heat lost = heat gained “
A
Conservation of energy
6
Q
any object/set of objects that we wish to consider
A
System
7
Q
3 types of system
A
closed system
isolated
open system
8
Q
in this system, no mass enters/leaves but energy can be exchanged w/ the environment
A
Closed system
9
Q
in this system, no energy in any form passes across its boundaries
A
Isolated
10
Q
- transition from one phase to another
- requires transfer of energy
A
Phase change
11
Q
TRUE/FALSE.
During phase changes, the temperature of the mixture also changes.
A
FALSE. it does not change
12
Q
solid to gas
A
sublimation
13
Q
solid to liquid
A
melting
14
Q
liquid to gas
A
eveaporation
15
Q
liquid to solid
A
freezing
