Evolved gas volume

Why is potassium aluminium sulphate not soluble in benzene A compound M has the composition C = 50.0% H=12.5%o A1 = 37.5%. 0.360 g of M reacts with an excess of water to evolve 0.336 1 of gas N and leave a white gelatinous precipitate R. R dissolves in aqueous sodium hydroxide and in hydrochloric acid. 20 cm of N require 40 cm of oxygen for complete combustion, carbon dioxide and water being the only products. Identify compounds N and R, suggest a structural formula for M, and write an equation for the reaction of M with water. (All gas volumes were measured at s.t.p.)... 

Other sources of sodium ion that are used to make sodium citrate are sodium carbonate and sodium bicarbonate. These reactions evolve large volumes of carbon dioxide gas, resulting in much foaming but less exotherm. 

The stiochiometry of the reaction was measured by reacting Pu metal with a THF solution of C2Rll2 in a sealed, evacuated flank. After 24 hours, volume and pressure measurements showed that 1.46 mm of gas was evolved, after correction for the vapor pressure of THF 1.54 mm of Pu was consumed, and titration of the THF filtrate found 1.8 mm of iodine. The gas composition was not determined, but assuming that the evolved gas was C H, these data indicate that the reaction is ... 

The readings obtained reflect the rate of the reaction and in many cases are sufficient although they may not give the quantitative information regarding the amount of gas evolved. For quantitative work, it is necessary to determine the flask constant (k), which takes into account the total gas volume of the system, the solubility of the gas in water and the absolute temperature of the reaction. This factor can then be used to convert the pressure readings into gas volume. 

Ohart (1946), 46-50 (Testing of fuze primers for Sensitivity by Drop-Test Machine, for Impulse and for Gas Volume evolved) ... 

HTA-3 (USA). Designation of expl mixt consisting of HMX 49, TNT 29 Al 22% (Type I) HTA-3, Type II contains HMX 49, TNT 28.65, Al 22 Ca silicate 0.35% mw 91, OB to C02-21% cast, sp gr 1.90 Brisance by Sand Test 61.3g crushed in 200g Bomb Detonation Rate for cast unconfined 1.0 inch diam chge 7866 m/sec Explosion Temperature ca 370° (flames erratically at 5 secs) Friction Pendulum Test-unaffected by fiber or steel shoe Gas Volume Evolved on Explosion 680cc/g Heat of Combustion 3687cal/g Heat of Explosion 1190 cal/g Heat of Formation, no value reported ... 

Gas Volume Developed on Explosion or Detonation. See Volume of Gases Evolved on Explosion or Detonation in Vol 1, p XXVI... 

Adjust the pressure of the gas in the test tube to atmospheric, mark the level of the water with a rubber band, and determine the volume of the evolved gas with a small measuring glass. Enter the cesults in your laboratory notebook using Form 13. 

Volume of water In flask, ml Volume of evolved gas under given conditions, ml Atmospheric pressure of gas, mmHg Temperature, Water vapour pressure, mmHg... 

In this reaction 779 kcal/kg is evolved, the gas volume V0 amounts to 240 l./kg, and the calculated temperature is 2700°C. For mixture consisting of 70% potassium nitrate and 30% charcoal (Sulphurless Gunpowder SFG.I2) the heat of reaction is 670 20 kcal/kg, according to Thomas [27]. 

The volume of oil at the lower pressure is B0. The quantity of gas evolved is the quantity in solution at the bubble point, Rsb, minus the quantity remaining in solution at the lower pressure, Rs. The evolved gas is called free gas. It is converted to reservoir conditions by multiplying by the formation volume factor of gas, Bg. 

Marshall (Ref 6) stated that the work carried in England at Woolwich Arsenal after WWI showed that all expls decompose to some extent in storage, evolving gas in accordance with the equation V = kt + C, where V is volume of gas evolved, t is the temp and C is a constant. For every 5°C increase in temp, the rate... 

The universal gas constant used in this equation is 83.15 lO nTbarkmoT1 K 1. In an open vessel, the gas production may result in evolving gas, liquid, or aerosols, which may also have secondary effects such as toxicity, burns, fire, and ecological, and even a secondary unconfined vapor or dust explosion. The volume of resulting gas can be estimated, using the same ideal gas law ... 

An alternative procedure is to add a little solid potassium dichromate or a small volume of 3 per cent hydrogen peroxide solution to the mixture and then to warm with dilute sulphuric acid the evolved gas is then passed through lime or baryta water. 

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