Heating Water Lab

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Pre-Lab Questions

1) Is water an element, a compound or a mixture?


2) Does the "particle" of water change as it goes from one phase (state of matter) to another phase (example when it goes from a solid to a liquid)?



3) Does the mass of water change from one phase to another?


4) Does it take energy to go from one phase to another?



5) Does the temperature change in this phase change?







Heating Water/ice Lab


Procedure (Directions):

1) Get a 100 ml beaker and thermometer. Then fill beaker 3/4 full of ice.

2) Using a scale, mass out the beaker and the ice.

3) Quickly put the beaker on the hot plate and start your watch.

4) Add the thermometer into the beaker (be careful not tip beaker over when you put thermometer in beaker) when you have enough of liquid level (from melting of ice) to have the bottom (silver/red part) under water.

5) Record the time you add the thermometer to beaker.

6) At first half minute or start of next minute, take a temperature reading and record it and the time.

7) Keep recording the temperature every 30 seconds (so put the time and temperature on your data table).

8) Record the time when all the ice have melted.

9) After recording time all ice have melted, quickly take beaker off hot plate and mass it out again. Then put it back on hot plate. Record mass of beaker and water. Should take less than 30 seconds to mass out beaker so you only miss one 30 second reading.

10) Keep on recording temperature (including time) every 30 seconds.

11) Record the time when the 1st bubble you see.

12) Keep on recording temperature (including time) until the water level is below bottom of thermometer (silver/red part). Then take thermometer out of beaker but KEEP the beaker on the hot plate and DO NOT stop the stopwatch time.

13) Record the time when all the water has boiled away.

14) Observer (but do not touch with hands) what is inside the beaker and then remove it from hot plate with gloves. Leave it next to hot plate to cool off.
15) Shut off hot plate and unplug it.
 

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Last edited January 28, 2020 1:24 pm (diff)
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