Boiling point of acetone

Most students will be familiar with simple distillation from their practical inorganic chemistry. Other students should determine the boiling-point of acetone (56°), using a water-bath and water-condenser, or of benzene (81 ), using a sand-bath and water-condenser, and finally of either aniline (184 ) or nitrobenzene (210 ), using for both these liquids a sand-bath and air-condenser. 

In view of the boiling points of acetone (57°) and isopropanol (82 ), the acetone can be steadily distilled off from the reaction-mixture, and the reduction ultimately becomes virtually complete. 

In order to shift the equilibrium of the reaction, the low boiling reaction product acetone is continuously removed from the reaction mixture by distillation. By keeping the reaction mixture at a temperature slightly above the boiling point of acetone, the reaction can then be driven to completion. 

Self-Test 8.3A The vapor pressure of acetone, C3H60, at 7.7°C is 13.3 kPa, and its enthalpy of vaporization is 29.1 kj-mol. Estimate the normal boiling point of acetone. 

Determine the boiling point of acetone given that the heat of vaporization is 31.9 kJ/mol and the entropy of vaporization is 96.8 J/mol-K. 

The apparatus shown in Fig. 2 has a 500-mL reaction vessel, which is coimected to a 50-mL reservoir for liquid /BP via a stopcock and a standard-taper joint, t The coimecting tubing between the reaction vessel and the mercury in the manometer must be wrapped with commercial heating tape or wound carefully with heating wire. The temperature of this section, which should be as short and of as small bore as feasible, is controlled with a variable-voltage power supply. It is not necessaiy to control this temperature accurately, but it should be close to the bath temperature (say, within 20°C) and must be above the boiling point of acetone (56°C). 

The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft, the atmospheric pressure is 630. torr. What would be the boiling point of acetone (AHvap = 32.0 kj/mol) at this elevation What would be the vapor pressure of acetone at 25.0°C at this elevation ... 

The normal boiling point of acetone is 56.2°C. Use Trou-ton s rule to estimate its molar enthalpy of vaporization. 

This very low dew point is due to the low boiling point of acetone and the low concentration. 

Aldol condensation of acetone produces diacetone alcohol (DAA), an environmentally friendlier solvent due to its low volatility and high boiling point, 165.6°C. Aldol condensation of acetone to produce DAA is strongly limited by equilibrium. At the boiling point of acetone, the equilibrium conversion of acetone... 

Acetone, also called propanone or dimethyl ketone, is the smallest ketone. It is The most familiar household use oface-a colorless, volatile liquid with a pleasant odor. The boiling point of acetone is tone iS as active substance in nail 56 °C. It can mix with water, alcohol and ether in all proportions. It is a wonder- polish remover. ful organic solvent, dissolving varnishes, lacquers, resins, plastics, paints, oils and their derivatives. 

T PE UIKIIILIT A C, I P.B CENT SOLUBLE AT 2S C. SOLUBILITY AT BOILING POINT OF ACETONE... 

The /7-nitrophenylhydrazone has a different thermal behavior. It does not decompose in the range of temperature used for analysis and does not show the low boiling point of acetone. To date, little use has been made of this powerful DTA technique in organic chemical analyses and syntheses. 

Calculate the separation factor for the system acetone (1)-water (2) at infinite dilution (xi = 1) (top of the column) at the normal boiling point of acetone (Th = 56.27 C). For the calculation, the following value of the activity coefficient at infinite dilution = 5.3 (measured at 55.3 C by Bergmann and Eckert [9]) should be applied. 

The acetone-methanol binary homogeneous minimum-boiling azeotropic system is considered with some of the solvents studied by Kossack et al. Three solvents are explored that have different normal boiling points (373 K for water, 464 K for DMSO, and 405 K for chlorobenzene). These solvents have different effects on the azeotropic mixture. The first and second solvents drive the acetone overhead in the extractive column. The chlorobenzene solvent drives the methanol overhead in the extractive column. The normal boiling points of acetone and methanol are 329 and 338 K, respectively, so acetone is the lighter component and would preferentially go overhead. The composition of the acetone-methanol azeotrope is 77.6 mol% acetone at atmospheric pressure as shown in Figure 11.1. 

Azeotropes formed with acetone at p Boiling point of acetone ((CH3)200) =... 

The method used for spinning cellulose acetate is dry spinning. The dope is heated (in some cases above the boiling point of acetone, 56.5 C) to lower its viscosity and thus reduce the pressure required to extrude it, and to supply some of the heat needed for evaporating the acetone solvent. (See Fig. 21.12.)... 

The normal boiling point of acetone, an important laboratory and industrial solvent, is 56.2 °C and its AvapH is 25.5 kJ moU. At what temperature does acetone have a vapor pressure of 375 mmHg ... 

When 9 g of urea (CH4N2O) are added to 1 kg of acetone at 1 bar, the boiling point of acetone raises 0.24 K. The normal boiling point of acetone is 329.2 K. From this datum, estimate acetone s enthalpy of vaporization. 

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