Heat Conductivity in Gases

In this experiment you will study the process of thermal conductivity by gas molecules.

Experimental Setup

The experimental setup that will be used in this experiment is shown in Figure 1.

The setup for study of the physical phenomenon of heat transfer.

Components:

  1. Long, straight glass tube of uniform inside diameter, with a radius r2 of 10mm.
  2. Tantalum wire, mounted coaxially. The geometrical parameters of the wire are: r1 = 0.25mm, L = 30cm. For Tantalum, α is 0.0036 and ρ0 is 1.220·10−7Ω·m
  3. Rotary vacuum pump.
  4. Pressure gauge.
  5. Gas cylinders filled with: He, Ar, N2 and CO2. The specific heat capacities at constant volume for these gases are:
    Gas Ar He N2 CO2
    Cv 1.5R 1.5R 2.5R 3.6R

    6. where R is the gas constant.