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η helium = 1.88 x 10-5 Pa s at 0 C, calculate the diffusion coefficient and the thermal conductivity coefficient.
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- Calculate the diffusion constant of nitrogen at 20.0 ̊C and 100.0 Pa, with = 0.43 nm^2 .Estimate the effective radius of a sucrose molecule in water at 25 °C given that its diffusion coefficient is 5.2 × 10−10 m2 s−1 and that the viscosity of water is 1.00 cP.The limiting molar conductivities of KF, KCH3CO2, and Mg(CH3CO2)2 are 12.89 mS m2 mol−1, 11.44 mS m2 mol−1, and 18.78 mS m2 mol−1, respectively (all at 25 °C). What is the limiting molar conductivity of MgF2 at this temperature?
- The diffusion coefficient of valine in water at 298 KKis 0.831×10−9m2⋅s−10.831×10−9m2⋅s−1. Determine the time it will take a valine molecule on average to diffuse an rms distance of 2.00. If the molecular diameter of valine is taken to be 0.300 nmnm, what is the time per random walk step?The diffusion coefficient of H2O in water at 25 °C is 2.26 × 10−9 m2 s−1. Estimate the time required for an H2O molecule to undergo a root-mean-square displacement of 1.0 cm.At 25 °C the molar ionic conductivities of Li+, Na+, and K+ are 3.87 mS m2 mol−1, 5.01 mS m2 mol−1, and 7.35 mS m2 mol−1, respectively. What are their mobilities?
- How is boundary molar conductivity determined in strong electrolytes?Use the experimental value of the thermal conductivity of neon (Table 16A.1) to estimate the collision cross-section of Ne atoms at 273 K.The diffusion coefficient of I2 in hexane at 25 °C is 4.05 × 10−9 m2 s−1. Estimate the time required for an iodine molecule to have a root mean square displacement of 1.0 cm.
- At 25 °C the molar ionic conductivities of F−, Cl−, and Br− are 5.54 mS m2 mol−1, 7.635 mS m2 mol−1, and 7.81 mS m2 mol−1, respectively. What are their mobilities?The limiting molar conductivities of KCI, KNO3, and AgNO3 are 14.99 mS m2 mol-1, 14.50 mS m' mol-1, and 13.34 mS m2 mol-1, respectively (all at 25 °C). What is the limiting molar conductivity of AgCI at this temperature?What pressure of nitrogen gas is required to produce a collision rate of 5.00 × 1019 s−1 at 525 K on a circular patch of surface of diameter 2.0 mm?