Nitrogen specific heat

Oxygen specific heat at constant volume Nitrogen specific heat at constant volume Hydrogen specific heat at constant volume Water specific heat at constant volume Oxygen thermal conductivity Nitrogen conductivity Hydrogen thermal conductivity Water thermal conductivity... 

Gas nitrogen Molecular weight 29 Ratio of specific heats 1.4 Inlet pressure 20 psia Outlet pressure 180 psia Inlet temperature 80°F Weight flow 100 Ib/min... 

Measurements in this held have been made by Berthelot and Ogier with nitrogen tetroxide Ann. de Chim. et Phys., [v.], 30, 382 (1883)), and with acetic acid ibid., 400), and some calculations with reference to steam have been made by Nernst Verhandl. Deutsch. Phys. Ges., 15, 313) and Levy ibid., 330), who utilised the vapour-pressure measurements of Holborn and Henning Ann. der Physik, (1906), 21 (1907), 22, 23). Wiedemann had previously observed that the specific heats of ethylbromide, ethyl-acetate, and benzene increase with temperature at about the same rate as that of nitrogen tetroxide at 200°. In the case of steam it was assumed that (i.) the polymerisation is to double molecules... 

Use specific heat values of 250 J/K mole for butane and 36 J/K mole for oxygen and nitrogen. 

Polyacrylonitrile (C3H3N) bums to form vapor, carbon dioxide and nitrogen. The heat of formation of the polyacrylonitrile is +15.85 kcal/g mol (1 cal= 4.186 kJ). Use data from Tables 2.1 and 2.2 use specific heat values at 1000 K. 

Nitrogen contained in a large tank at a pressure P = 200000 Pa and a temperature of 300 K flows steadily under adiabatic conditions into a second tank through a converging nozzle with a throat diameter of 15 mm. The pressure in the second tank and at the throat of the nozzle is P, = 140000 Pa. Calculate the mass flow rate, M, of nitrogen assuming frictionless flow and ideal gas behaviour. Also calculate the gas speed at the nozzle and establish that the flow is subsonic. The relative molecular mass of nitrogen is 28.02 and the ratio of the specific heat capacities y is 1.39. 

The flame temperature values reported in Fig. 1.3 show some interesting trends. The H/C ratio has a greater effect in rich systems. One can attribute this trend to the fact that there is less nitrogen in the rich cases as well as to a greater effect of the mean specific heat of the combustion products. For richer systems the mean specific heat of the product composition is lower owing to the preponderance of the diatomic molecules CO and H2 in comparison to the triatomic molecules C02 and H20. The diatomic molecules have lower... 

Use such reasonable approximations as (1) Air consists solely of nitrogen and oxygen in exactly 4 1 volume ratio (2) other chemical surface reactions can be neglected because of the short times (4) ideal shock wave relations for pure air with constant specific heats may be used despite the formation of nitric oxide and the occurrence of high temperature. 

The trends of the results in Fig. 4.23 can be readily explained. Argon and nitrogen have thermal diffusivities that are approximately equal. However, Ar is a monatomic gas whose specific heat is lower than that of N2. Since the... 

A sample of the polymer to be studied and an inert reference material are heated and cooled in an inert environment (nitrogen) according to a defined schedule of temperatures (scanning or isothermal). The heat-flow measurements allow the determination of the temperature profile of the polymer, including melting, crystallization and glass transition temperatures, heat (enthalpy) of fusion and crystallization. DSC can also evaluate thermal stability, heat capacity, specific heat, crosslinking and reaction kinetics. 

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