1. Consider a 1.00 m3 tank containing pure N2 at 20.0°C and 5.00 bar. Assume the N2 molecules are rigid spheres with a diameter of 0.37 nm.
a) What is the mean free path of the N2 molecules in the tank?
b) What is the mean free path of N2 molecules at 20.0°C and 1.0 x 1036 torr (a typical pressure in a vacuum system)?
2. What is the pressure at the top of a 75.0 meter high cylinder containing CO2 at 25.0°C if the pressure at the bottom of the cylinder is 10.00 bar?
3. The thermal conductivity of CH4 gas at 25°C and 1 atm is 3.4 x 1034 J cm31 K31 s31. Estimate the heat per square centimeter that would flow in 10 minutes between two reservoirs as in figure 15.1 connected by a 25 cm long cylinder containing CH4 gas at 1.0 atm. Assume steady state conditions with T2=28°C and T1=24°C.
T reservoir Substance Adiabatic wall. T2 T1 12 reservoir 475 Section 15.2 Thermal Conductivity Figure 15.1 Conduction of heat through a substance.
