1-Make a rough estimate of the thermal conductivity of n-butane both as a liquid at 20 °C and as a gas at 5 bara and 200 °C. Take the viscosity of the gaseous n-butane as 0.012 mN ms.
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A: Ans- ANSWER IS IN EXPLANATION PART Explanation:
Q: A poiseuille flow experiment was carried out to measure the viscosity of air at 298 K. The sample…
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A: The explanation is given below-
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- 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?10.11/ A 1.5-kg specimen of a 90 wt% Pb-10 wt% Sn alloy is heated to 250°C (480°F), at which temperature it is entirely an a-phase solid solution . The alloy is to be melted to the extent that 50% of the speci- men is liquid, the remainder being the a phase. This may be accomplished either by heating the alloy or changing its composi- tion while holding the temperature con- stant. (a) To what temperature must the speci- men be heated? (b) How much tin must be added to the 1.5-kg specimen at 250°C to achieve this state? 10.15) A magnesium-lead alloy of mass 5.5 ka consists of a solid a phase that has a compo- sition that is just slightly below the solubility limit at 200°C (390°F). (a) What mass of lead is in the alloy? (b) If the alloy is heated to 350°C (660°F). how much more lead may be dissolved in the a phase without exceeding the solubility limit of this phase? 10.27 A hypothetical A-B alloy of composition 55 wt% B-45 wt% A at some temperature is found to consist of mass…1.Calculate the mass of the liquids collected in surface tension determination. 2. Calculate the average drop mass by dividing the mass of liquid collected with the number of drops. 3. Calculate the drop volume using Eqn 3b-4.The literature values of the density of water and ethanol can be seen in Table 3b-5. Assume that the temperature is 30°C. 4. Before computing for the surface tension, determine the correction factor (f) at r/v1/3 , where r is the outer radius of the burette tip, using Table 3b-4. To locate f in the table, use the following example as guide: If r/v1/3 = 0.32, then find what values in the row and column headings will make a sum of 0.32. In this case, 0.3 (row) plus 0.02 (column) equals 0.32. Thus, f = 0.72313. 5. Finally, calculate the surface tension using Eqn 3b-3:
- The viscosity of methane at 20 °C and 1 atm pressure is 1.09x10-4 Calculate the average collision diameter in cm.The thermal conductivity of carbon dioxide at 0 ºC is 0.0145 J K-1m-1 s-1. Estimate the diameter of the molecule knowing that Cp,M= 66 Jmol-1 K-1. Solution: 4.23 ÅSubstances A and B with capacity factors 6.3 and 11.4, respectively, are being carried by a mobile phaseflowing at a velocity of 0.53 mm/s. What is the length of a column required to separate these two substanceswith a resolution of 1? Assume that the sample zones for both A and B broaden based on the van Deemter equation H = 0.35 + 0.48/u+ 0.57u where Hand u are expressed in µm and mm/s, respectively.
- Polycarbonate, PC, is used for aircraft canopies. A batch of this polymer was found to fail prematurely when impacted by a 4 pound bird during qualification studies. You suspect that the problem is due to a molecular weight difference for this particular batch of polymer compared to previous batches. You decide to perform dilute solution viscosity studies to determine the Mol.wt. Assume density is 1.2g/cm3 What solvent would you use? Justify your answer Please answer very soon will give rating surelyη helium = 1.88 x 10-5 Pa s at 0 C, calculate the diffusion coefficient and the thermal conductivity coefficient.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.
- What is the amount of energy required (in KJ) to convert 100g of ice at -20 degrees to steam vapour at 120 degrees? If the total amount of surfactant to be used in an emulsion is 5g, calculate the amount of Span 80 (HLB=4.3) and Tween (HLB =16.7) in order to obtain an HLB value of 9.5Calculate the diffusion constant of argon at 20 °C and (i) 1.00 Pa, (ii) 100 kPa, (iii) 10.0 MPa; take σ = 0.36 nm2. If a pressure gradient of 1.0 bar m−1 is established in a pipe, what is the flow of gas due to diffusion at each pressure?An Ostwald viscometer was used to determine the time of flow of syrup at 20 °C. Data for Water:Time of flow: 0.23 secondsDensity at 20 °C: 0.998 g/cm³Viscosity: 0.0101 poiseData for Syrup:Time of flow: 1.42 secondsDensity at 20 °C: 1.153 g/cm³ 1. What is the fluidity of water? 2. From the computed viscosity of syrup, what will be its kinematic viscosity? 3. From the computed viscosity of syrup, what will be its fluidity? 4. What is the viscosity of syrup? 5. What is the kinematic viscosity of water?