PROCEDURE :

1. Set the water bath temperature at desired level (25 ₀C- 50 ₀C) and wait till the bath attains the set temperature.

2. Fill the T- tube with carbon tetrachloride to within two centimeters of the top of Capillary leg . Note down the initial diffusion height of the liquid in the capillary from the top end (x₀).

3. Make the connection with the air or vacuum pump and allow a gentle current of air to flow over the capillary.

4. Record the height of liquid (x) from the top of the capillary tube after every 30 mins.

5. Repeat the steps 1 to 4 for different temperatures.

6. Plot diffusion co-efficient against absolute temperature on a log - log graph and determine the slope. It should lie between 1.5 to 1.8.

SETUP DESCRIPTION :

The main components of the experimental setup are:

1. Glass T- Tube

2. Constant temperature water bath.

3. Air pump

4. Travelling Microscope

5. Volatile components is filled in the T- tube and air passed over it by the pump and change in the level is seen by the sliding microscope.

 

 

EXPERIMENTAL SETUP :

LEVEL OF CARBON TETRACHLORIDE AT T=0

LEVEL OF CARBON TETRACHLORIDE AT T=6 HRS

 

The animation below describes the process :