a. A standard rotary pump is capable of producing a vacuum on the order of 10 3
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a. A standard rotary pump is capable of producing a vacuum on the order of 10−3 Torr. What is the single-particle collisional frequency and mean free path for N2 at this pressure and 298 K?
b. A cryogenic pump can produce a vacuum on the order of 10–10 Torr. What is the collisional frequency and mean free path for N2 at this pressure and 298 K?
For N2, σ = 4.3 × 10–19 m2 (see Table 33.1) and M = 0.028 kg mol–1.
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a b 211 O PN RT 103 tom 1 atm 760 torr 821x10 L atm molK298 ...View the full answer
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