Vapor Pressure Lab

Data Tables and Observation: Fill out the data sheet (below) for the experiment and submit with this form. Recording data carefully

Step 3: Use the thermometer to identify and record the temperature for room temperature, in your refrigerator, in your freezer, and then research the temperature of boiling water (do not take this temperature) and record them in Table 2.

27. Heat the water to 40°C with an alcohol lamp by setting up the apparatus as shown in figure 3 below:

1. Move the lid of the container up or down. Record the resulting volume and pressure

mL cylinder to the beaker on the stir plate and empty it into the beaker. Place the pH probe in the beaker and record the pH in the data table. Drag the beaker to the red disposal bucket. Double-click the bottle of NaHCO3 to move it to the Stockroom counter. Repeat steps 5 and 6 for KNO3.

This is the same process as in distillation that involves evaporating a liquid into a gas phase, then condensing the gas back into a liquid

Place the beaker on the hot plate, place the thermometer in the beaker and set the hot plate to 5oC.

Fill a test tube about 1/3 full with cold tap water for use in step 34.

2A. Evaporation is related to the properties of matter because it is a liquid and a gas. We know this because there are three states of matter which are soild, liquid and gas since evaporation first starts as a liquid (water). Then it turns into gas (cloud).

Definition of rate of evaporation. How it changes as temperature changes. Therate of evaporationcan be defined as the number of water molecules that change phase from liquid to gas each second. The rate of evaporation is mainly set by the temperature of the liquid water.The higher the temperature of the liquid water, the faster the rate of evaporation. Definition of rate of condensation. How it changes as vapor pressure (a measure the amount of the gas water vapor above the liquid surface) changes. Therate of condensationcan be defined as the number of water vapor molecules that change phase from gas to liquid each second. The rate of condensation depends mainly on the vapor pressure in the space above the liquid surface. Thus, the higher the concentration of water vapor molecules above the liquid surface, the faster the rate of condensation. What is meant by saturation Why will a closed system like this always move toward saturation with respect to water vapor You may take saturation to mean the capacity or maximum amount of water vapor that will can exist in the air at a particular temperature. It is important to understand that saturation vapor pressure (or the maximum amount of water vapor that can be in the air) increases exponentially as temperature

seltzer tablet into it, and as I did so I started the timer. When Alka

The Lab One was done on Laboratory Techniques and Measurements. The first experiment with my Lab partner; we got opportunity to experiment how to conduct measurements in length by using metric conversion. We started in cm units and changed into mm by x10, and moving decimal point x1 to right. To find in meter we moved from cm to meter two decimal points to the left or double check our self divided by 100 and all records in data table 1. The second experiment was to measure temperature of how cold and hot tap water can be by using thermometer in Celsius units. From this experiment, gained knowledge that tab water doesn’t boil to 100 Celsius related to containing different

4. Remelt the contents of the tube and add the counterpart component based on the given schedule. Ask the demonstrator to adjust the cooling water between mixtures. During the experiment, record and plot the data obtained for all mixtures listed. The experiments are stopped as follows:

Empty and clean the test tubes and repeat steps 2-10 again for a second dataset.

To achieve this, the final value from each thermocouple was set to be equal to the warm water bath temperature (370C), and the initial reading was set equal to the ice water bath temperature. Thus, for each thermocouple an equation was obtained using the two points to convert voltage readings to temperature. An example of the calibration for one of the thermocouples is shown in Appendix II.