Phase Change Lab Report

Phase Change Lab Report by Dylan Norford
Abstract: The purpose of this experiment is to study the energy changes associated with the phase changes of water. In this experiment we know the water is gaining energy so we know the heat is going to be positive and we can use the equation MCΔT to find the energy change. The specific heat will be 1 and we just have to measure the water to find the mass and take the temperature before and after we start to find the energy change.
Background: The science behind this experiment is that we know that water has a melting point at 0C and a boiling point at 100C. The first part of the graph is the ice changing temperatures from -.2C to 0C. That part of the graph is modeled by MCΔT. The second part of the graph is the ice changing to water. This part of the graph is modeled by MKFusion. The third part of the graph is the water now increasing temperature and going from 0C to 100C. This part of the graph is modeled by MCΔT. The fourth part of the graph is the water changing from a liquid to gas and the graph levels off showing. This part of the graph is modeled by MKVaporization.
Procedure: First a 400mL beaker was filled 2/3 full with ice. Next the time and temperature were recorded every minute for 18 minutes. All the data was recorded in a data table. Next the beaker was put on a hot plate and the temperature was taken and recorded every 30 seconds. Then the water was left to continue boiling for 5 more minutes and time and temperature were recorded every 30 seconds. Finally a graph of time and temperature was made.
Equipment and material:
400 mL beaker

Hot plate

Thermometer

Ice

Data:
Time
Temperature
Minute 1
-.2
Minute 2
-.2
Minute 3
-.2
Minute 4
-.2
Minute 5
.2
Minute 6
.3
Minute 7
.5
Minute 8
.5
Minute 9
0
Minute 10
.1
Minute 11
.1
Minute 12
.4
Minute 13
.2
Minute 14
.3
Minute 15
.3
Minute 16
.1
Minute 17
.1
Minute 18
.3

Time
Temperature
:30
69.7C
1:00
72.6C
1:30
76C
2:00
80C
2:30
83.2C
3:00
85.8C
3:30
88.6C
4:00