Chemical properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. Chemical properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. Physical vs. Chemical Properties • Examples: –melting point –flammable –density –magnetic –tarnishes in air physical chemical physical physical chemical. Ice freezes as it expands, which explains why ice is able to float on liquid water. The colour of water and ice is, intrinsically, a very slight blue hue, although water appears colourless in small quantities. Ice and liquid water structure Temperature ≤ 0°C Temperature > 0°C < 100°C •Ice is less dense than liquid water •Water is liquid at a relatively high temperature > 0°C (Methane (CH 4) is similar in size but liquid only below -161°C) Hydrogen bond Liquid water 3.6: Five Critical Properties of Water 1. Water is so essential for life that when we look for indications of life extraterrestrially, we typically look first for water or signs of water. The chemical formula of a molecule of water is H2O: two atoms hydrogen (H2) linked to one atom oxygen (O). (Prediction and Correlation of Physical Properties) Evan Buck, M.S.Ch.E., Manager, Thermophysical Property Skill Center, Central Technol-ogy, Union Carbide Corporation. Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. Ice also appears colourless, and water vapour is essentially invisible as a gas. The physical and chemical properties of water have permitted living things to appear, to survive, and to evolve on this planet. The present post describes the Physical, Chemical and Unusual Properties of Water. Water is the solvent, the medium and the participant in most of the chemical reactions occurring in our environment. Solid Fixed Volume Fixed Shape Least Kinetic Energy Liquid Fixed Volume Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. Chemical Properties and Changes. background prerequisites for this textbook are general chemistry, mathematics up to calculus, and fluid mechanics. (Prediction and Correlation of Physical Properties) The raw treated water can be checked and analysed by studying and testing these characteristics as explained below: Physical Characteristics of Water 1. The chemical formula of a molecule of water is H2O: two atoms hydrogen (H2) linked to one atom oxygen (O). Water is an essential ingredient of animal and plant life crediting to its unique physical, chemical and biological properties. If the bubbles were caused by the decomposition of a molecule into a gas (such as H 2 O →H 2 and O 2 ), then boiling would be a chemical change. The suitability of a habitat for life here on Earth, or extraterrestrially, depends in large part on the chemical and physical properties of water. 1.The potential density strati cation (layered structure) of seawater is controlled by temperature and salinity. These ‘unusual properties’ are responsible making water as the ‘solvent of life’. We will also discuss the importance or significance of these properties of water in the biological system. Thomas E. Daubert, Ph.D., Professor, Department of Chemical Engineering, The Penn-sylvania State University. Boiling water: Boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H 2 O). Some are essential for life while others have profound effects on Chemical properties of water. The properties of water make it suitable for organisms to survive in during differing weather conditions. The major chemical and physical properties of water are: water is a tasteless, odourless liquid at standard temperature and pressure.

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