Ethanol density

Ethanol (EtOH, alcohol ) naturally occurs in fruit in small quantities. Alcoholic drinks contain much higher concentrations. Their alcohol content is usually given as percent by volume. To estimate alcohol uptake and the blood alcohol level, it is useful to convert the amount to grams of ethanol (density 0.79 kg L ). For example, a bottle of beer (0.5 L at 4% v/v alcohol) contains 20 mb = 16 g of ethanol, while a bottle of wine (0.7 L at 12% v/v alcohol) contains 84 ml = 66 g ethanol. 

A 10% volume SiC ethanol suspension Dg = 0.3 pm cr = 2) is slip cast with a conical plaster of Paris mold to make a radome for an airplane. The pores in the mold are 50 pm in diameter and the permeability of the mold is negligible compared to that of the powder. Determine the time necessary to slip cast a conical green body with a wall thickness of 1.5 cm. Assume that the ultimate packing density of the SiC powder is 80% theoretical. Data for ethanol density 0.7893 gm/cc viscosity 1.2 cP and yi = 24 dynes/cm. 

A solution of ethanol (C2H5OH) in water is prepared by dissolving 75.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution ... 

Corn contains 82% starch (dry weight basis) and an unfermentable residue of corn oil, gluten, fiber, etc. How many litres of 100% ethanol (density 0.789 kg/L) would be obtained from one metric tonne of dry corn, assuming quantitative conversions of starch to fermentable sugars, and sugar fermentation to ethanol ... 

I ve included 2532 (benzoic acid, 2-acetamido) to show that you sometimes get a bonus. Here nd(aa) means you get needle-like crystals from acetic acid. Acetic acid (aa) is the recrystallization solvent (see Chapter 13, Recrystalhzation ), and you don t have to find it on your own. Thus, pa ye nd (al) means that pale yellow needles are obtained when you recrystalHze the compound from ethanol. Density. 1.0749 °. This is an actual density of benzoic acid taken at 13O C. There is no temperature ratio as there is for the specific gravity (1.2659 ). 

The sample has been diluted 100-fold in the ethanol, so do the calculation based on 2,000 ppm rather than 20 ppm. Use the ethanol density, because it overwhelms that of the dimethyldisulfide. 

The density of the foil samples was also measured in order to correlate the dielectric constant results with the density values. These density measurements were performed according to ASTM D1505-68 with the aid of a water/ethanol density gradient column at a temperature of 21.00°C + 0.01°C. 

When specifying a concentration of one substance in another, the terms by mass, by volume, and by weight are sometimes used to specify important differences. For example, lOOcm of a 24% solution of ethanol (density of 0.816g/cm ) in water (density of l.OOg/cm ) by volume contains 19.6g (24cm X 0.816g/cm ) ethanol, whereas a 24% solution by weight contains 24g of ethanol. Uncertainty exists when the basis of measurement is not provided. 

Table 7.4 Settling characteristics of water entrainers in ternary azeotropes with ethanol Density of...

A 15.7-g aluminum block is warmed to 53.2 °C and plxmged into an insulated beaker containing 32.5 g of wafer initially at 24.5 °C. The aluminum and the water are allowed to come to thermal equilibrium. Assuming that no heat is lost, what is the final temperature of the water and aluminum 106. 25.0 mE of ethanol (density = 0.789g/mE) initially at 7.0 °C is mixed with 35.0 mL of water (density = l.Og/mL) initially at 25.3 °C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture ... 

A porous solid slab (50 percent void space) is soaked in ethanol. The slab is placed in a well-mixed container of water at 25°C. The effective diffusivity of ethanol in water can be taken as 1 x 10 cm /sec. Assume that the water and ethanol densities are essentially the same. If the concentration of ethanol in the water is initially zero, find how long it will take the ethanol mass fraction at the slab center to decrease to 0.009. 

The combustion of liquid ethanol (C2H5OH) produces carbon dioxide and water. After 4.62 mL of ethanol (density = 0.789 g/mL) is allowed to bum in the presence of 15.55 g of oxygen gas, 3.72 mL of water (density = 1.00 g/mL) is collected. Determine the limiting reactant, theoretical yield of H2O, and percent yield for the reaction. (Hint Write a balanced equation for the combustion of ethanol.)... 

Mixture density = Xwater x water density + Xethanol x ethanol density Solution... 

Yield is 861 dry ethanol (density 0.79 kg/1) per tonne sugar cane harvested at a water content of 72.5 %, or 247 kg ethanol per tonne dry sugar cane (Macedo et al. 2004 as cited by JRC 2007). 

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