Substance Formula Phase Csp (J/goC) Aluminum Al solid 0.900 Cadmium Cd solid 0.232 Chromium Cr solid 0.448 Copper Cu solid 0.385 Diamond C solid 0.519 Gold Au solid 0.129 Graphite C solid 0.711 Helium He gas 5.19 Hydrogen H2 gas 14.3 Iodine I2 solid 0.427 Iron Fe solid 0.444 Krypton Kr gas 0.247 Lead Pb solid 0.159 Magnesium Mg solid 1.017 Mercury Hg liquid 0.138 Neon Ne gas 1.03 Nickel Ni solid 0.444 Nitrogen N2 gas 1.04 Oxygen O2 gas 0.916 Platinum Pt solid 0.133 Silicon Si solid 0.703 Silver Ag solid 0.237 Sulfur S solid 0.732 Tin Sn solid 0.213 Titanium Ti solid 0.523 Tungsten W solid 0.133 Uranium U solid 0.115 Water H2O liquid 4.184 Xenon Xe gas 0.158 Zinc Zn solid 0.388 *Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesPromoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here Specific Heat Capacity of NitrogenSpecific Heat Capacity of Nitrogen(OP) 2 Dec 03 11:16 I'm working on a project in which I'm assessing the suitability of injecting nitrogen into a space in order to cool it down more rapidly than natural cooling (to assist in maintenance work and minimise downtime) However, for this I need to know the specific heat capacity of Nitrogen (i.e. how much heat energy it will take from the space in order to achieve equilibrium) and have a figure for this of 1.042 j.g-1.K-1 at 300K. How does this change in relation to the starting temperature ? Will the energy required to raise 1g of N2 by 1 deg K always be the same, or will it rise ? Thanks Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action. ResourcesLow-Volume Rapid Injection Molding With 3D Printed Molds  Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now Design for Additive Manufacturing (DfAM) Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now Industry Perspective: Education and Metal 3D Printing Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so it’s critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Download Now Taking Control of Engineering Documents This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now Nitrogen, N 2 , is at standard conditions a colorless odorless gas. The gas makes up the major portion of the atmosphere, but will not support life by itself. Refrigerated (cryogenic) nitrogen, is a colorless odorless liquid. Gaseous nitrogen is used in food processing, in purging air conditioning and refrigeration systems, and in pressurizing aircraft tires. Liquid nitrogen is used to freeze foods, to preserve whole blood and other biologicals, and as a coolant. Nitrogen is nontoxic and noncombustible, but it may cause asphyxiation by displacement of air. Liquid nitrogen is very cold and and contact may cause frostbite. Under prolonged exposure to fire or heat, nitrogen containers may rupture violently and rocket. The is shown below the table. Chemical, physical and thermal properties of Nitrogen: Values at 25 o C (77 o F, 298 K) and atmospheric pressure Nitrogen - Thermophysical Properties Molecular Weight 28.013 Specific Gravity , air = 1 0.967 Specific Volume ( ft 3 /lb, m 3 /kg ) 13.98, 0.872 Density of liquid at atmospheric pressure ( lb/ft 3 , kg/m 3 ) 50.46, 808.4 Absolute Viscosity ( lb m /ft s, centipoises ) 12.1 10 -6 , 0.018 Sound velocity in gas ( m/s ) 353 Specific Heat - c p - ( Btu/lb o F or cal/g o C, J/kgK ) 0.249, 1040 Specific Heat Ratio - c p /c v 1.40 Gas constant - R - ( ft lb/lb o R, J/kg o C ) 55.2, 297 Thermal Conductivity ( Btu/hr ft o F, W/m o C ) 0.015, 0.026 Boiling Point - at saturation pressure 14.7 psia and 760 mm Hg - ( o F, o C ) -320.4, -195.8 Latent Heat of Evaporation at boiling point ( Btu/lb, J/kg ) 85.5, 199000 Freezing or Melting Point at 1 atm ( o F, o C ) -346, -210 Latent Heat of Fusion ( Btu/lb, J/kg ) 11.1, 25800 Critical Temperature ( o F, o C ) -232.6, -147 Critical Pressure ( psia, MN/m 2 ) 493, 3.40 Critical Volume ( ft 3 /lb, m 3 /kg ) 0.051, 0.00318 Flammable no Follow the links below to get values for the listed properties of nitrogen at varying pressure and temperature :
See also more about atmospheric pressure , and STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure , as well as Thermophysical properties of: Acetone , Acetylene , Air , Ammonia , Argon , Benzene , Butane , Carbon dioxide , Carbon monoxide , Ethane , Ethanol , Ethylene , Helium , Hydrogen , Hydrogen sulfide , Methane , Methanol , Oxygen , Pentane , Propane , Toluene , Water and Heavy water, D 2 O . Nitrogen is a gas at standard conditions. However, at low temperature and/or high pressures the gas becomes a liquid or a solid. The nitrogen phase diagram shows the phase behavior with changes in temperature and pressure. The curve between the critical point and the triple point shows the nitrogen boiling point with changes in pressure. It also shows the saturation pressure with changes in temperature. At the critical point there is no change of state when pressure is increased or if heat is added. The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium. |
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