Partial pressure of nitrogen

Pn, = partial pressure of nitrogen Pnh3 = partial pressure of ammonia (-1 ) = rate of reaetion of nitrogen, moles of nitrogen disappearing per unit time per unit mass of eatalyst... 

A sample of nitrogen is collected over water at 18.5°C. The vapor pressure of water at 18.5°C is 16 mm. When the pressure on the sample has been equalized against atmospheric pressure, 756 mm, what is the partial pressure of nitrogen What will be the partial pressure of nitrogen if the volume is reduced by a factor 740/760 ... 

Self-Test 9.9A The initial partial pressures of nitrogen and hydrogen in a rigid, sealed vessel are 0.010 and 0.020 bar, respectively. The mixture is heated to a temperature at which K = 0.11 for N2(g) + 3 H2(g) 2 NH3(g). What are the equilibrium partial pressures of each substance in the reaction mixture ... 

Now let s discuss the pressure computations. The observed reactor pressure is a sum of the partial pressures of nitrogen and the styrene monomer vapor. The vapor pressure of the styrene vapor is an increasing function of temperature and decreasing function of conversion. This is explained by the Flory-Huggins relationship ( ). 

Fig. 4.2 Comparison of amino acid yields using CH4, CO and CO2 as carbon sources with the addition of varying amounts of H2. The yields were calculated on the basis of the amount of carbon present in the reaction mixture. In all cases, the partial pressures of nitrogen, methane, carbon monoxide and carbon dioxide were lOOmmHg. For the reactions using nitrogen, the reaction vessel contained 100 mL of water, but no ammonia. Reactions involving nitrogen and ammonia were carried out using 100 mL of ammonium chloride (0.05 M). The electrical discharge experiments took 48 hours at room temperature (Schlesinger and Miller, 1983)...

Plan (1) Calculate the partial pressure of nitrogen in the container at 25°C and 750. torr. 

SAQ 5.7 What is the total pressure of 10 g of nitrogen gas and 15 g of methane at 298 K, and what is the partial pressure of nitrogen in the mixture [Hint you must first calculate the number of moles involved.]... 

Niobium metal absorbs nitrogen, similar to hydrogen, forming interstitial solid solution. The absorption occurs at 300°C and the solubility of nitrogen in the metal is directly proportional to the square root of the partial pressure of nitrogen. The reaction is exothermic and the composition of such interstitial solid solution varies with the temperature. When the metal is heated with nitrogen at temperatures between 700 to 1,100°C, the product is niobium nitride, Nb2N or (NbNo.s) [12033-43-1]. When heated with ammonia at these temperatures, niobium forms this nitride. Another niobium nitride exists, NbN [24621-21-4], with a face-centered cubic crystalline structure. 

Another area in which the gas laws play a key role is in scuba diving. At the surface, we breath air at a pressure of approximately 1 atmosphere. The partial pressures of nitrogen and oxygen are 0.78 and 0.20 atmosphere, respectively. A scuba diver breaths compressed air that is delivered at a pressure that corresponds to the pressure at the depth of the diver. Because 33 feet of... 

Starting with a 10% nitrogen-in-helium mixture, the sample, held slightly above ambient pressure, is immersed in the coolant. When the adsorption signal is complete, the pressure is raised to 2 atm, which increases the partial pressure of nitrogen to 0.2 atm or the equivalent of a 20 % mixture at 1.0 atm. After the completion of each adsorption signal, the pressure is incrementally increased until, at ISOpsia saturation is reached. 

Here PNO2 partial pressure of nitrogen dioxide in pascals (1 Pa = 0.000145 psi), and the activation energy is 3870 kJ/mol. Other saturated polymers are less susceptible to attack by NO2 than most unsaturated polymers such as synthetic rubbers (polyiso-prene, polybutadiene, and butyl rubber). The presence of oxygen also tends to accelerate degradation by NO2. The reaction of sulfur dioxide with saturated polymers is complex, but appears to be activated by ultraviolet radiation. 

Consider the formation of ammonia from stoichiometric amounts of hydrogen and nitrogen in the gas phase (Eq. 9.4). If, after establishment of equilibrium, the total pressure is increased, does the partial pressure of nitrogen increase, decrease, or stay the same ... 

At 4000°K. the total vapor pressure of carbon is 0.43 atm. Consequently, the system is heterogeneous at 1 atm. pressure, and higher pressures can only be achieved by increasing the partial pressure of nitrogen. At pressures up... 

Self-Test 9.1A Calculate the change in molar free energy when the partial pressure of nitrogen in a mixture of gases is increased from 0.600 bar to 1.800 bar at 298 K. 

Pno2 Partial pressure of nitrogen dioxide in absorption-gas... 

PN204 Partial pressure of nitrogen tetroxide in absorption-gas stream. 

Stage 4 The balance between nitrogen dioxide and nitrogen tetroxide is calculated. This involves solution of a quadratic equation incorporating two reaction constants. The quadratic is shown below in terms of the partial pressure of nitrogen dioxide ... 

Pnox = partial pressure of nitrogen peroxide (dioxide +... 

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