Post on 20-Mar-2018
1
Heating and Cooling Curves
A
B C
D E
F
Time in minutes
Tem
pera
ture
in C
els
ius
0
100
0 2 6 8 10 4 12
150
-50
Curve of Water Heating
2
Heating Curve of Water
A
B C
D E
F
Time in minutes
Te
mp
era
ture
in C
els
ius
0
100
0 2 6 8 10 4 12
150
-50
Section Time
(min)
Temp.
(°C)
State Potential
Energy
Kinetic
Energy
A-B 0-1 -50-0 S Same ↑
B-C 1-5 0 S, L ↑ Same
C-D 5-8 0-100 L Same ↑
D-E 8-10 100 L, G ↑ Same
E-F 10-12 100-150 G Same ↑
3
Heating Curve of Water
A
B C
D E
F
Time in minutes
Te
mp
era
ture
in C
els
ius
0
100
0 2 6 8 10 4 12
150
-50
Point B =
Point D =
Melting Point
Boiling Point
Is this curve endothermic or exothermic?
Heat is added/absorbed
4
Cooling Curve of Water
A
B C
D E
F
Time in minutes
Te
mp
era
ture
in C
els
ius
0
100
0 2 6 8 10 4 12
150
-50
Point B =
Point D =
Freezing Point
Condensation Point
Is this curve endothermic or exothermic?
Heat is removed/emitted