水有哪些特征“thepropertiesofwater”要用英文回答
<p>问题：水有哪些特征“thepropertiesofwater”要用英文回答<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">乔西铭的回答：<div class="content-b">网友采纳 Water'sChemicalProperties Youprobablyknowwater'schemicaldescriptionisH2O.Asthediagramtotheleftshows,thatisoneatomofoxygenboundtotwoatomsofhydrogen.Thehydrogenatomsare"attached"toonesideoftheoxygenatom,resultinginawatermoleculehavingapositivechargeonthesidewherethehydrogenatomsareandanegativechargeontheotherside,wheretheoxygenatomis.Sinceoppositeelectricalchargesattract,watermoleculestendtoattracteachother,makingwaterkindof"sticky."Astheright-sidediagramshows,thesidewiththehydrogenatoms(positivecharge)attractstheoxygenside(negativecharge)ofadifferentwatermolecule.(Ifthewatermoleculeherelooksfamiliar,rememberthateveryone'sfavoritemouseismostlywater,too). Allthesewatermoleculesattractingeachothermeantheytendtoclumptogether.Thisiswhywaterdropsare,infact,drops!Ifitwasn'tforsomeofEarth'sforces,suchasgravity,adropofwaterwouldbeballshaped--aperfectsphere.Evenifitdoesn'tformaperfectsphereonEarth,weshouldbehappywaterissticky. Wateriscalledthe"universalsolvent"becauseitdissolvesmoresubstancesthananyotherliquid.Thismeansthatwhereverwatergoes,eitherthroughthegroundorthroughourbodies,ittakesalongvaluablechemicals,minerals,andnutrients. PurewaterhasaneutralpHof7,whichisneitheracidicnorbasic. DiagramaboutpH Water'sPhysicalProperties Waterisuniqueinthatitistheonlynaturalsubstancethatisfoundinallthreestates--liquid,solid(ice),andgas(steam)--atthetemperaturesnormallyfoundonEarth.Earth'swaterisconstantlyinteracting,changing,andinmovement. Waterfreezesat32oFahrenheit(F)andboilsat212oF(atsealevel,but186.4°at14,000feet).Infact,water'sfreezingandboilingpointsarethebaselinewithwhichtemperatureismeasured:0oontheCelsiusscaleiswater'sfreezingpoint,and100oiswater'sboilingpoint.Waterisunusualinthatthesolidform,ice,islessdensethantheliquidform,whichiswhyicefloats. Waterhasahighspecificheatindex.Thismeansthatwatercanabsorbalotofheatbeforeitbeginstogethot.Thisiswhywaterisvaluabletoindustriesandinyourcar'sradiatorasacoolant.Thehighspecificheatindexofwateralsohelpsregulatetherateatwhichairchangestemperature,whichiswhythetemperaturechangebetweenseasonsisgradualratherthansudden,especiallyneartheoceans. Waterhasaveryhighsurfacetension.Inotherwords,waterisstickyandelastic,andtendstoclumptogetherindropsratherthanspreadoutinathinfilm.Surfacetensionisresponsibleforcapillaryaction,whichallowswater(anditsdissolvedsubstances)tomovethroughtherootsofplantsandthroughthetinybloodvesselsinourbodies. Here'saquickrundownofsomeofwater'sproperties: Weight:62.416poundspercubicfootat32°F Weight:61.998poundspercubicfootat100°F Weight:8.33pounds/gallon,0.036pounds/cubicinch Density:1grampercubiccentimeter(cc)at39.2°F,0.95865gramperccat212°F Herearesomewatervolumecomparisons: 1gallon=4quarts=8pints=128fluidounces=231cubicinches 1liter=0.2642gallons=1.0568quart=61.02cubicinches 1milliongallons=3.069acre-feet=133,685.64cubicfeet
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