Compare And Contrast The Chemical And Physical Properties Of Propane

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A physical property is a characteristic of a substance that, when changed, does not change the identity of the substance in question. The chemical makeup of the atom, molecule, particle, mixture, or compound does not change. Thus, the substance remains fairly unchanged. Color, state, smell, melting point, and boiling point are all examples of physical properties (teacherlingo.com 1). Density is a physical property. Propane is denser than air, so when released it sinks to the floor. Carbon, one of the atoms in propane (c3h8), is often a black color, while hydrogen and oxygen do not have color. Propane is colorless and odorless when in its natural form, but odor is often added for commercial purposes. It has a molar mass of 44.0626 grams per …show more content…
Corrosion is a chemical property. Propane is non-corrosive. Flammability, a substance’s ability to burn is also a chemical property. Propane is extremely flammable. Heat of combustion is the, “...amount of energy released when a substance is burned with oxygen” (yourdictionary.com 1). Propane’s heat of combustion is 2220 kJ/mol^-1. This means that 1 mole of propane, when combusted, would create 2220 kJ of heat (ausetute.com 1). KJ stands for kiloJoule, or 1000 Joules. A joule is the standard unit of energy. One calorie (the standard unit of heat) is equal to 4.184 Joules (kentchemistry.com 1). Converted, 50 mJ of heat are created per kilogram. MJ means “megajoule,” and says to multiply the given amount by 10^6. The fire caused by the combustion of propane has a temperature less than or equal to 1979.444 *C. pH is also a chemical property. The pH of water (H2O) should be near a neutral seven in order for it to sustain most life. A substance is acidic if it has more free hydrogen ions than free hydroxyl ions. The opposite is true for substances that are basic (water.usgs.org). Chemical properties also include the types of chemical bonds. Propane has one covalent bond, which is a bond where one pair of electrons are shared (pubchem.ncbi.nlm.nih.go 1). Reactivity is also considered a chemical property. Hydrogen, one of the …show more content…
The chemical name for the reactant propane (C3H8) is dimethylmethane; the chemical name for oxygen (O2), also a reactant, is dioxygen. On the products side of the equation there is carbon dioxide (CO2), whose chemical name is identical to its common, as well as water (H2O), or dihydrogen monoxide. Put together, that says: dimethylmethane and five dioxygen yields three carbon dioxide and four dihydrogen monoxide. In order to have his chemical equation be balanced, three coefficients must be added. For example, the coefficient of 5 means that 5 oxygen molecules are needed in order to have the same amount of oxygen on both sides. There are only three different atoms in the equation, carbon, hydrogen, and oxygen. The presence of only carbon and hydrogen in propane makes it a hydrocarbon. Hydrocarbons are alkanes, the simplest organic molecules. The basic formula for determining the ratio of carbon to hydrogen in an alkane is CnH2n+2. This is followed by propane because 2(3)+2 is 8. The smallest alkane is methane, and the eighth and the largest common alkane is octane, with 8 carbon. Carbon is essential for life because of its aforementioned ability to bond with other elements. This makes it the only element capable of the complexity required for life. Carbon has an atomic number of 6, meaning that it has six protons and is sixth on the periodic

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