tag:blogger.com,1999:blog-19043956830040680472024-02-18T20:13:06.403-08:00iLmU iTu PeLiTa HiDuP"sesungguhnya amalan datang dengan niat" & "tuntutlah ilmu sehingga ke negeri China & sampai ke penghujung liang lahad"NuRuL AiN RohAiZaThttp://www.blogger.com/profile/08682089309305705202noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-1904395683004068047.post-41652760334034709342010-07-02T07:50:00.000-07:002010-07-02T08:10:34.910-07:00WaTEr<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkipPC0frWlcOQoJMMOiRZT-hAhZYk7RT2BApUpyNuqxsnquDiEldTUQiZFT1Dzl-WSk_BMoneLZIQ5gFhHBFQFcbcgI_At1bVUf9ZZRALwsI6OY72t1nzIiozTo414tIQWw5TheuzZ6r7/s1600/water.jpg"><img style="display: block; margin: 0px auto 10px; text-align: center; cursor: pointer; width: 400px; height: 320px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkipPC0frWlcOQoJMMOiRZT-hAhZYk7RT2BApUpyNuqxsnquDiEldTUQiZFT1Dzl-WSk_BMoneLZIQ5gFhHBFQFcbcgI_At1bVUf9ZZRALwsI6OY72t1nzIiozTo414tIQWw5TheuzZ6r7/s400/water.jpg" alt="" id="BLOGGER_PHOTO_ID_5489322693260577922" border="0" /></a><span style="font-weight: bold;font-size:100%;" ><br /></span><div style="text-align: justify;"><span style="font-size:85%;"><span style="font-weight: bold;font-size:100%;" ><span style="font-family: verdana;">WATER & Ph</span></span></span><br /><br /><span style="font-size:85%;"><span style="font-family: verdana;"> Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. One molecule of water connected to each other by hydrogen bond. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice and gaseous state, water vapor or steam.</span></span><br /><br /><span style="font-size:85%;"><span style="font-size:100%;"><span style="font-family: verdana; font-weight: bold;">Properties of water</span></span></span><br /><br /><span style="font-size:85%;"><span style="font-family: verdana;">1.<span style="font-style: italic; font-weight: bold;">When water molecule are close to each other, they will arrange themselves in such a way that is positively charged hydrogen atom from one water molecule will be attracted to a negatively charged oxygen atom from another water molecule.</span><span style="font-weight: bold;"> </span>Such electrostatic interactions that exist among polar molecules from hydrogen bonds. Hydrogen bond forms a strong force that holds the water molecules in place. This makes water a relatively stable compound. </span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">2.<span style="font-style: italic; font-weight: bold;">Water has highest boiling point</span> and therefore, remains liquid at room temperature. When heat energy is introduced, it will break the hydrogen bond between water molecules before it can increase their movement and turn to increase the temperature of water. Water has ability to resists temperature change. </span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">3.<span style="font-style: italic; font-weight: bold;">Water is a universal solvent for polar(charged) molecules </span>and thereby facilities chemical reactions both outside and within our body. Water dissolves polar compound easily due to the electrostatic interaction between water molecule and charged components in the compound. </span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">4.<span style="font-weight: bold; font-style: italic;">Water has low viscosity.</span></span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">5.<span style="font-weight: bold; font-style: italic;">Water exhibits high surface tension. </span>Water molecule tends to stick together due to cohesive forces. </span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">6.<span style="font-weight: bold; font-style: italic;">Water has a high specific heat capacity</span> due to hydrogen bonding between its molecules. Thus, compared to other substances, water requires more heat to increase temperature. A large amount of heat causes a slight increase in temperature. The high specific heat capacity of water enables water temperature in cells to remain relatively constant.</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">7.Water moderates high temperatures through its <span style="font-style: italic; font-weight: bold;">high latent heat of vaporization</span>, the amount of heat required to convert water from liquid to vapour.</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">8.<span style="font-weight: bold; font-style: italic;">Density of water </span>decrease when below 4°C.</span></span><br /><br /><span style="font-size:85%;"><span style="font-weight: bold;font-size:100%;" ><span style="font-family: verdana;">The importance of water</span></span></span><br /><br /><span style="font-size:85%;"><span style="font-family: verdana;">1.Water acts as an <span style="font-weight: bold; font-style: italic;">inert medium for many chemical reactions</span> that take place in living organisms.</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">2.Water <span style="font-weight: bold; font-style: italic;">itself is involved in many chemical reactions.</span></span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">3.Water acts as a <span style="font-weight: bold; font-style: italic;">medium of transport for dissolved nutrients</span> within and between cells and also <span style="font-weight: bold; font-style: italic;">helps removal of waste.</span></span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">4.Water acts a <span style="font-weight: bold; font-style: italic;">lubricants </span>:</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">-<span style="font-style: italic;">Mucus</span> helps earthworms and snails in movements. In mammals, mucus helps in the movement of food through the alimentary canal.</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">-<span style="font-style: italic;">Synovial fluid </span>lubricates joints in vertebrates.</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">-<span style="font-style: italic;">Pleural fluid</span> lubricates movements of lungs during breathing.</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">-<span style="font-style: italic;">Pericardial fluid </span>lubricates movements of the hearts.</span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">5.Water also acts as a <span style="font-weight: bold; font-style: italic;">carrier of heat and plays an important role during heat dissipation.</span></span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">6.Water is also an important environmental factor that affects the life of organisms. A number of living organisms live in <span style="font-weight: bold; font-style: italic;">aquatic habitats.</span> </span></span><br /><span style="font-size:85%;"><span style="font-family: verdana;">7.Water has and continues to play a very important role in t<span style="font-weight: bold; font-style: italic;">he evolution of biological systems on Earth.</span></span></span><br /><br /><span style="font-size:85%;"><span style="font-size:100%;"><span style="font-family: verdana; font-weight: bold;">pH of water</span></span></span><br /><br /><span style="font-size:85%;"><span style="font-family: verdana;">-Water is considered to be neutral. With a <span style="font-weight: bold; font-style: italic;">pH of 7</span>.</span></span><br /></div>NuRuL AiN RohAiZaThttp://www.blogger.com/profile/08682089309305705202noreply@blogger.com0tag:blogger.com,1999:blog-1904395683004068047.post-13721000150952185152010-06-14T02:25:00.000-07:002010-06-14T02:49:51.289-07:00~Starting~<div style="text-align: center; font-weight: bold; font-family: verdana;"><span style="font-size:85%;">Assalamualaikum...<br />this blog is starting for me to talk about Islam and about my course in medic...<br />right now i'm taking Biomedicine (HONS) in Management & Science Univeristy..<br />my father wanna me to be a DENTIST..<br />but i really don't know...<br />so,,<br />i create this blog to make me talk about what i have learn in class..<br />and also<br />my talk in Islam and you can call as DAKWAH in arabic..^^<br /></span></div>NuRuL AiN RohAiZaThttp://www.blogger.com/profile/08682089309305705202noreply@blogger.com0