Lab: States of MatterNames: ______
Period: ____ Date: ______
Purpose: How is the state of matter affected by the temperature to which it is heated?
Hypothesis: If ______
Then ______
SAFETY PRECAUTIONS:
1)HOT PLATES: DO NOT TOUCH, TEACHER WILL REMOVE BEAKERS.
2)EYE SAFETY: KEEP GOGGLES ON AT ALL TIMES.
**Hot liquids will splatter when placed on a hot plate without a beaker. Keep away from hot plate.
Procedure:
Materials: goggles, aprons, glass beaker, hot plate, thermometer, ice, stop watch, food coloring.
Procedure:
1)Fill the glass beaker with ice, then fill in the space between the ice with water leaving about two centimeters at the top of the beaker.
2)Place the thermometer in the middle of the ice and let it sit for 30 seconds. Then record the start temperature below on the chart. Then begin the stopwatch and allow it to continue running throughout the experiment.
3)Place the beaker with thermometer in it onto the hot plate. Turn the hot plate on to setting #10. Continue timing. Begin stirring. Do not remove the thermometer at any time throughout the experiment.
4)Every minute record the temperature on the chart.
5)Place an M (for melted) next to the number on your chart when the ice has completely melted.
6)Continue recording the temperature every minute, stirring the liquid with the thermometer.
7)Place a V (for vaporize) next to the number on your chart when the water begins to show signs of boiling.
8)Place a B (for boiling) next to the number on your chart when the water begins to show signs of boiling.
9)Turn the hot plate off when the water comes to a constant boil. Do not remove the beaker. (You may not have filled in the complete chart below, that’s o.k.!)
10)Place the thermometer back in the plastic bin provided.
Time / Start / 1 min / 2min / 3 min / 4 min / 5 min / 6 min / 7 min / 8 min / 9min / 10minTemp. / 5 °C / 10°C / 12°C / 13°C / 14°C / 19°C / 22°C / 28°C
(M) / 36°C / 42°C / 49°C
°C / 11min / 12min / 13min / 14min / 15min / 16min / 17min / 18min / 19min / 20min / 21min
Temp. / 55°C / 62°C (V) / 67°C / 73°C / 76°C / 81°C / 85°C / 89°C / 94°C
(B) / 98°C / 99°C
What is the:
Independent Variable ______
Dependent Variable ______
Analysis: Create a LINE graph on the chart showing the temperature change throughout the experiment.
Graph of TimeVersusTemperature for Water
0 2min 4min 6 min 8min 10min 12min 14min 16min 18 min 20
Time in Minutes
Use the hand-out to answer the questions below with your partner:
1. Place a M, V, and B on the graph above to represent when your liquid melted, vaporized, and boiled.
2. What do you think would happen if we allowed the water to remain on the hot plate for two hours?
______
3. How did we make the water change state? ______
4. How could we make a gas turn into a liquid and then into a solid?______
5. Draw what the molecules of water might look like in a solid, liquid, gas, and plasma below.
Sublimation
FreezingCondensation
MeltingVaporization
SolidLiquid GasPlasma
Deposition (Think deposit.)
6. When a substance changes from a solid to a liquid it is called: ______
7. When a substance changes from a liquid to a gas it is called: ______
8. When a substance changes from a gas to a liquid it is called: ______
9. When a substance changes from a liquid to a solid it is called: ______
Think of the ice that changed to water in this experiment. Place a check mark into each box to show if the solid, liquid, or gas, has a definite or determined shape and volume.
State / Has a certain & unchanging size / Has a certain & unchanging shapeSolid
Liquid
Gas
Is water still water when it changes phases? Why or why not? _____, ______
______