Properties Water at www.japanese-home-gardens.com

The latter figure is important when con densing steam is employed in domestic and industrial heating systems. Chemistry.—Since the physical properties water oi water are dependent upon its chemical structun and composition, some of these properties water wil be covered in the following discussion of the chemistry of water. The ancient philosophers included water among the four elements, the other three being earth, air, and fire. The term "element" had a much different meaning at that time, and water represented the properties water of cold and fluidity.

Other physical properties water of water, particu larly its thermal properties water, make it industrial!; useful. The standard thermal units, the calori and the British thermal unit (Btu.), are based 01 water, the former being the quantity of heat re quired to raise one gram of water at its maximun density through one centigrade degree, and th latter, one avoirdupois pound of water througl one Fahrenheit degree. (The unit, kilocalorie, o 1,000 calories, is more common.) Approximate!; 80 calories must be removed from one gram o water at 0° C. to convert it to ice, and about 54( calories are required to convert water at 100° C to steam.

Filter media are characterised by many different chemical and mechanical properties water, and the right combination can usually be found for most applications. Purchas (1980) identified some 20 significant properties water divided into three major categories: (a) machine-orientated properties water (Table 8.2), (b) application-orientated properties water (Table 8.3) and (c) filtration-specific properties water (Table 8.4). Although all are important one way or another, the machine-orientated properties water are often considered in discussion with the media supplier and the user may not have access to meaningful information on these properties water.