A standard rotary pump is capable of producing a vacuum on the order of 10-3Torr . What is the single - particle collisional frequency for N2 at this pressure and 288 K ? The collisional cross section of N2 is 4.3\times 10-19m2 Express your answer in reciprocal seconds to one significant figure.
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- What is the total collisional frequency at 298 K for a collection of Ne and He confined to a 1 dm3 container with partial pressure of 0.45 atm Ne and 0.55 atm He?Starting from the definition of Cp and Cv, derive the expression of (Cp-Cv) expressed onlyin measurable quantities. the final answer will be:Starting from the definition of Cp and Cv, derive the expression of (C₁-Cv) expressed only in measurable quantities.
- GNO+UNt what volume of NH3 s, at Standard tempature Hz>5N2+ 6 Hz O 3. tempatire pressur e (STP), is required to reactcoith 15.0g Of NO? a 5.68L 可 7.47L CIO.OL d ll.2LA solid surface with dimensions 3.5 cm × 4.0 cm is exposed to helium gas at 111 Pa and 1500 K. How many collisions do the He atoms make with this surface in 10 s?In a study of the catalytic properties of a titanium surface it was necessary to maintain the surface free from contamination. Calculate the collision frequency per square centimetre of surface made by O2 molecules at 300 K and (a) 100 kPa, (b) 1.00 Pa. Estimate the number of collisions made with a single surface atom in each second. The conclusions underline the importance of working at very low pressures (much lower than 1 Pa, in fact) in order to study the properties of uncontaminated surfaces. Take the nearest neighbour distance as 291 pm.
- Virial Equation of State The virial equation of state: Z - pVm RT poon B(T) + CVT) 1+ m + D(T) V3 What is the pressure (in bar) of a 5.84 mol sample of helium gas at a volume of 30.7 L and at 100 K? Assume the gas obeys the virial equation of state truncated to second order, and round your answer to the hundredths (0.01) place. At T = 100 K, B = 11.4 cm³/mol for helium.Determine a particular solution u (x, t) for Subject to u(0, t) = 0 = u (L,t); u (x, 0) = 0; a²u at² a²u == x²; 0 Ju (x,0) at = 1 With the general solution u (x,t) = (A cos wx + B sin wx) (C cos wx + D sin wx)The highest building in Montreal is the ‘1 square building’, with a height of 203m.The atmospheric pressure in the streets of Montreal is P1 = 9.9 x 104Pa.Suppose air density is constant : ρair= 1,2 kg/m3 and g = 9.8 m/s2. Suppose the rooftop temperature to be T = 298K, and the air composition is 100%N2 molecules. The collision cross-section of N2 molecules is 0.43 nm2.*f. Find the collision frequency. Is it in the order of magnitude that you wereexpecting?
- Suppose that S is regarded as a function of T and p, show that TdS= C,dT- T(dP/aT)y dV.For a normal phase separation, predict the order of elution of the following compoundsa. n-hexane, n- hexanol, benzene, 1,2-hexadiol, 1,2-pentadiolb. ethyl acetate, diethyl ether, nitrobutane, 2-nitrobutane, 3-methyl-1-nitrobutane, 2-methyl-1-nitrobutaneQ9 + Show that, for a perfect gas, (US)y= T and (@U/V)₁=-p.