O deciding on the number of trials to perfom O determining the procedure O deciding on the appropriate equipment O determining what data to collect
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- 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 surelyMatch the following: Freezing point depressionThe effect of supercoolingFreezing point of pure solventRegion where liquid is coolingRegion where liquid is freezing I have attached a picture for this question. I guessed the answers to be B,D,E,F,A but i am not sure if it is correctThe graph below illustrates the effect of temperature on Vrxn. Place in order decreasing the illustrated temperatures.
- (Refer attachment) Suggest other types of excess Gibbs energy model that can be used to calculate the activity coefficient as well as to predict pressure and composition from vapor liquid equilibrium data for the given system.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…A monolayer of CO molecules is adsorbed on the surface of 1.00 g of an Fe/AI2O3 catalyst at 77 K, the boiling point of liquid nitrogen. Upon warming, the carbon monoxide occupies 4.25 cm3 at O oC and 1.00 bar. What is the surface area of the catalyst?
- Pls answer only the sub part (iv), (v) and (vi) thank uPolyethylene terephthalate is an example of synthetic material in Materials and Engineering. 1. Describe the relation of its building blocks in connection to its “bulk” (materials) properties. (No need for essay, just a brief scientific explaination!) If you may, please send link as well of the reference that you use for the answer).Propose an acceptable structure that is consistent with the data.
- What is the surface tension of benzene(in micro-Newton/m), if it rises to a height of 1.06299 inch in a capillart tube with a circumference of 1.570796 mm. The density of benzene is 54.477 lb/ft³. With the contact angle to be 0°.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:In the following figure, which parameter of van Deemter equation is involved in these variations. Which curve of them would provide the best separation of analytes and at what linear velocity?