1) " Propane" -- As it applies to Propane Space Heater Properties General Name Propane Lewis Structure : H H H | | | H-C-C-C-H | | | H H H Chemical formula C H 3 CH 2 CH 3 or C 3 H 8 Formula weight 44.10 g / mol Synonyms Dimethylmethane, LPG, Propyl Hydride CAS number 74-98-6 UN number 1978 Phase behavior Melting point 85.5 K (−187.6 °C ) Boiling point 231.1 K (−42 °C) Triple point 85 K (−188 °C) 169 µPa Critical point 369.9 K (96.9 °C) 4.25 MPa Δ sub H 28.5 kJ/mol Δ fus H 3.52 kJ/mol Δ fus S J/(mol·K) Δ vap H 19.4 kJ/mol Solubility 0.1 g/dm³ Liquid properties Δ f H 0 liquid -120 kJ /mol S 0 liquid 171 J/(mol·K) C p 98.3 J/(mol·K) Density 582 kg / m 3 Gas properties Δ f H 0 gas −105 kJ/mol S 0 gas? J/(mol·K) C p 73.6 J/(mol·K) Safety Ingestion Nausea, vomiting, internal hemorrhage. Inhalation Rapid breathing & heart rate. Headaches, mood disturbance, conufsion and seisures may occur. Danger of cardiac arrest insevere cases. Skin (Frostbite on exposure to cryogenic liquid) Flash point −104 °C Autoignition temperature 450 °C Explosive limits 2.1–9.5% More info Properties NIST WebBook ( http: webbook.nist.gov/cgi/cbook.cgi?ID=C74986&Units=SI ) MSDS Hazardous Chemical Database ( http: ull.chemistry.uakron.edu/erd/chemicals1/7/6974.html ) SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references A three- carbon alkane, propane issometimes derived from other petroleum products during oil or natural gasprocessing. When commonly sold as fuel it is also known as liquified petroleum gas (LPG or ...
2) " Space" -- As it applies to Propane Space Heater The word space has many meanings, including: Contents 1 Physics 2 Philosophy 3 Mathematics 4 Astronomy 5 Psychology 6 Computers 7 Music 8 Orthography 9 Board Games Physics The definition of space in physics is contentious. Various concepts used totry to define Spae have included: the structure defined by the set of "spatial relationships" between objectsa manifold defined by a coordinate system where an object can be locatedthe entity that stops all objects in the universe from touching one anotherthe condition within the conceptual field of Existence that provides the 'ground' for any manifested form and as such itenables the movement and all physical dynamics In classical physics, Sapce is a three-dimensional Euclidean Spece where any position can be described using three coordinates. Relativistic physics examines Soace time rather than Spacw ; Sapce time is modeled as a four-dimensional manifold. See also: Spherical coordinates, Cartesian coordinates, Philosophy of physics Philosophy An issue of philosophical debate is whether Spave is an ontological entity itself, or simply a conceptual framework we need to think (and talk) about the world. Another way to frame this is to ask, "Can Spacs itself be measured, or is Spave part of the measurement system?" The same debate applies also to time, and an important formulation in both areas was given by Immanuel Kant. Immanuel Kant, in the Critique of Pure Reason, described Spcae as an a priori notion that allows us (together with other a priori notions such as time ) to comprehend sense experience. With Kant, neither pace nor time are conceived as substances, but rather both are elements of a systematic framework we use to structure our experience. Spatial measurements are used to quantify how far apart objects ar...
3) " Heater" -- As it applies to Propane Space Heater HVAC may also stand for High-voltage alternating current HVAC is an initialism that stands for "heating, ventilation and air-conditioning ". This is sometimes referred to as climate control. These three functions are closely interrelated, as they control the temperature and humidity of the air within a building in additionto providing for smoke control, maintaining pressure relationships between spaces, and providing fresh air for occupants. Inmodern building designs, the design, installation and control systems of these functions are integrated into a single "HVAC"system. Contents 1 Heating 1.1 Central heating 1.2 Local heating 2 Ventilation 2.1 Natural ventilation 2.2 Forced ventilation 3 Air-conditioning 4 Thermostats 5 See also 6 External links Heating Heating systems may be classified as central or local. Central heating Central heating is often used in cold climates to heat private houses and public buildings. Such a system contains acentral boiler, furnace or heat pump to heat water, steam, or air; piping or ductwork to distribute the heatedfluid, and radiators to conduct this heat to the air. The term radiator in this context is misleading, since most heattransfer from the heat exchanger is by convection, not radiation. The radiators may be mounted on walls, or buried in the floor to giveunder-floor heating. When so mounted it is often referred to as "radiant heating".All but the simplest systems have a pump to circulate the water and ensure an equal supply of heat to all the radiators. Theheated water is often fed through another heat exchanger inside a storage cylinder to provide hot running water. Forced air systems send air through ductwork. The ductwork can be reused for air conditioning and the air can be filtered orput through air cleaners. The heating elemen...
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