Denizler ve g\u00f6ller so\u011fuk k\u0131\u015f g\u00fcnlerinde dipten yukar\u0131 do\u011fru de\u011fil, yukar\u0131dan a\u015fa\u011f\u0131ya do\u011fru donmaya ba\u015flar. Bu do\u011fa harikas\u0131n\u0131n sebebi suyun kendine \u00f6zg\u00fc karakteristik \u00f6zelli\u011fidir. Suyun, di\u011fer bir\u00e7ok maddeden farkl\u0131 olarak, en yo\u011fun hali +4\u00b0C\u2019de, normal ko\u015fullarda 1 atm bas\u0131n\u00e7 alt\u0131ndaki s\u0131v\u0131 halidir. Bu \u00f6zellik, suyun yo\u011funlu\u011funu ve molek\u00fcler davran\u0131\u015f\u0131n\u0131 benzersiz k\u0131lar.<\/p>\n
Su, di\u011fer maddelerde oldu\u011fu gibi so\u011fuduk\u00e7a yo\u011funla\u015fmaz. Bunun yerine, +4\u00b0C\u2019de maksimum yo\u011funlu\u011fa ula\u015f\u0131r. Bu s\u0131cakl\u0131\u011f\u0131n alt\u0131na d\u00fc\u015ft\u00fc\u011f\u00fcnde ise yo\u011funlu\u011fu azal\u0131r. Yo\u011funlu\u011fu daha az olan buz, s\u0131v\u0131 suyun \u00fczerinde y\u00fczer. Bu nedenle, so\u011fuk k\u0131\u015f g\u00fcnlerinde denizler ve g\u00f6ller y\u00fczeyden donmaya ba\u015flar ve buz tabakas\u0131 su y\u00fczeyinde kal\u0131r. B\u00f6ylece suyun alt\u0131ndaki canl\u0131lar, donmam\u0131\u015f s\u0131v\u0131 su katman\u0131nda ya\u015famlar\u0131n\u0131 s\u00fcrd\u00fcrebilirler.<\/p>\n
Su molek\u00fclleri, so\u011fuduk\u00e7a birbirine yakla\u015f\u0131r ancak +4\u00b0C\u2019de maksimum yo\u011funlu\u011fa ula\u015ft\u0131ktan sonra birbirlerinden uzakla\u015fmaya ba\u015flar. Bu davran\u0131\u015f, su molek\u00fcllerinin hidrojen ba\u011flar\u0131 ile birbirine ba\u011flanmas\u0131ndan kaynaklan\u0131r. +4\u00b0C\u2019de iki \u00f6nemli kuvvet dengededir: termal genle\u015fme ve hidrojen ba\u011flar\u0131. Hidrojen ba\u011flar\u0131, su molek\u00fcllerinin kristal kafes yap\u0131lar\u0131 olu\u015fturmas\u0131na neden olur ve bu yap\u0131 suyun yo\u011funlu\u011funu azalt\u0131r. Bu kristal kafes yap\u0131lar\u0131, su dondu\u011funda daha belirgin hale gelir ve buzun yo\u011funlu\u011fu azal\u0131r.<\/p>\n
Suyun \u00f6zk\u00fctlesi, 1 atm bas\u0131n\u00e7 alt\u0131nda 1 gr\/cm\u00b3 olarak bilinir. Suyun \u00f6zk\u00fctlesi, 0\u00b0C\u2019den +4\u00b0C\u2019ye kadar artar ve +4\u00b0C\u2019de maksimum de\u011feri olan 1 gr\/cm\u00b3\u2019e ula\u015f\u0131r. Bu noktadan sonra, +100\u00b0C\u2019ye kadar s\u0131cakl\u0131k artt\u0131k\u00e7a suyun \u00f6zk\u00fctlesi azal\u0131r. +100\u00b0C\u2019de su buharla\u015f\u0131r ve \u00f6zk\u00fctlesi 0,0006 gr\/cm\u00b3\u2019e iner. Bu hesaplamalar saf su i\u00e7in ge\u00e7erlidir. \u0130\u00e7inde \u00e7\u00f6z\u00fcnm\u00fc\u015f maddeler bulunan suyun \u00f6zk\u00fctlesi ve kaynama noktas\u0131 de\u011fi\u015fkenlik g\u00f6sterebilir.<\/p>\n
+4\u00b0C s\u0131cakl\u0131kta, termal genle\u015fme ve hidrojen ba\u011flar\u0131 m\u00fckemmel bir denge i\u00e7indedir. Bu s\u0131cakl\u0131kta hidrojen ba\u011flanmas\u0131 sebebiyle suda kristal kafes yap\u0131lar\u0131 olu\u015fmaya ba\u015flar. +4\u00b0C\u2019nin alt\u0131na inildi\u011finde, hidrojen ba\u011flar\u0131 bask\u0131n hale gelir ve su molek\u00fclleri aras\u0131ndaki bo\u015fluk artar. Bu bo\u015fluklar, suyun dondu\u011funda yo\u011funlu\u011funun azalmas\u0131na neden olur. +4\u00b0C\u2019nin \u00fcst\u00fcnde ise termal genle\u015fme kuvvetleri bask\u0131n hale gelir. Bu kuvvetler, suyun molek\u00fcllerini birbirinden uzakla\u015ft\u0131rarak yo\u011funlu\u011fun azalmas\u0131na neden olur. Tam +4\u00b0C\u2019de ise bu kuvvetler m\u00fckemmel bir denge i\u00e7indedir ve suyun \u00f6zk\u00fctlesi en y\u00fcksek de\u011ferine ula\u015f\u0131r.<\/p>\n
Su, ya\u015fam\u0131n kayna\u011f\u0131d\u0131r ve suyun bu benzersiz \u00f6zellikleri, do\u011fal ya\u015fam\u0131n devaml\u0131l\u0131\u011f\u0131 i\u00e7in hayati \u00f6nem ta\u015f\u0131r. Denizler ve g\u00f6llerde buz tabakas\u0131n\u0131n su y\u00fczeyinde kalmas\u0131, alt\u0131ndaki suyun s\u0131v\u0131 halde kalmas\u0131n\u0131 sa\u011flar. Bu durum, bal\u0131klar ve di\u011fer su canl\u0131lar\u0131n\u0131n k\u0131\u015f mevsiminde hayatta kalabilmelerine olanak tan\u0131r. Suyun +4\u00b0C\u2019de maksimum yo\u011funlu\u011fa ula\u015fmas\u0131, \u00e7evresel dengeyi koruyarak ekosistemlerin sa\u011fl\u0131kl\u0131 bir \u015fekilde i\u015flemesini sa\u011flar.<\/p>\n
Su neden +4\u00b0C\u2019de maksimum yo\u011funlu\u011fa ula\u015f\u0131r?<\/strong><\/p>\n Su, +4\u00b0C\u2019de maksimum yo\u011funlu\u011fa ula\u015f\u0131r \u00e7\u00fcnk\u00fc bu s\u0131cakl\u0131kta hidrojen ba\u011flar\u0131 ve termal genle\u015fme kuvvetleri dengededir. Bu denge, su molek\u00fcllerinin en s\u0131k\u0131 \u015fekilde paketlenmesini sa\u011flar.<\/p>\n Buz neden suyun y\u00fczeyinde y\u00fczer?<\/strong><\/p>\n Buz, suyun y\u00fczeyinde y\u00fczer \u00e7\u00fcnk\u00fc yo\u011funlu\u011fu s\u0131v\u0131 suya g\u00f6re daha azd\u0131r. Su donarken molek\u00fcller aras\u0131ndaki bo\u015fluklar artar ve bu da buzun yo\u011funlu\u011funu azalt\u0131r.<\/p>\n Su dondu\u011funda neden geni\u015fler?<\/strong><\/p>\n Su dondu\u011funda geni\u015fler \u00e7\u00fcnk\u00fc hidrojen ba\u011flar\u0131 su molek\u00fcllerinin aras\u0131ndaki bo\u015fluklar\u0131 art\u0131rarak kristal bir kafes yap\u0131s\u0131 olu\u015fturur. Bu yap\u0131, suyun hacminin artmas\u0131na neden olur.<\/p>\n Suyun yo\u011funlu\u011fu neden +4\u00b0C\u2019den sonra azal\u0131r?<\/strong><\/p>\n Suyun yo\u011funlu\u011fu +4\u00b0C\u2019den sonra azal\u0131r \u00e7\u00fcnk\u00fc termal genle\u015fme kuvvetleri bask\u0131n hale gelir. Bu kuvvetler, su molek\u00fcllerini birbirinden uzakla\u015ft\u0131rarak yo\u011funlu\u011fun azalmas\u0131na neden olur.<\/p>\n Denizler ve g\u00f6ller neden dipten de\u011fil, y\u00fczeyden donmaya ba\u015flar?<\/strong><\/p>\n Denizler ve g\u00f6ller y\u00fczeyden donmaya ba\u015flar \u00e7\u00fcnk\u00fc suyun yo\u011funlu\u011fu +4\u00b0C\u2019de maksimuma ula\u015f\u0131r ve bu s\u0131cakl\u0131\u011f\u0131n alt\u0131nda yo\u011funluk azal\u0131r. Yo\u011funlu\u011fu azalan buz, y\u00fczeyde y\u00fczer ve suyun alt\u0131 s\u0131v\u0131 halde kal\u0131r.<\/p>\n Suyun bu \u00f6zelli\u011fi do\u011fal ya\u015fam\u0131 nas\u0131l etkiler?<\/strong><\/p>\n Suyun bu \u00f6zelli\u011fi, k\u0131\u015f mevsiminde su alt\u0131ndaki canl\u0131lar\u0131n hayatta kalmas\u0131n\u0131 sa\u011flar. Buz tabakas\u0131 su y\u00fczeyinde kal\u0131rken, alt\u0131ndaki su s\u0131v\u0131 halde kalarak bal\u0131klar ve di\u011fer su canl\u0131lar\u0131 i\u00e7in ya\u015fanabilir bir ortam sunar.<\/p>\n","protected":false},"excerpt":{"rendered":" Denizler ve g\u00f6ller so\u011fuk k\u0131\u015f g\u00fcnlerinde dipten yukar\u0131 do\u011fru de\u011fil, yukar\u0131dan a\u015fa\u011f\u0131ya do\u011fru donmaya ba\u015flar. Bu do\u011fa harikas\u0131n\u0131n sebebi suyun kendine \u00f6zg\u00fc karakteristik \u00f6zelli\u011fidir. Suyun, di\u011fer bir\u00e7ok maddeden farkl\u0131 olarak, en yo\u011fun hali +4\u00b0C\u2019de, normal ko\u015fullarda 1 atm bas\u0131n\u00e7 alt\u0131ndaki s\u0131v\u0131 halidir. Bu \u00f6zellik, suyun yo\u011funlu\u011funu ve molek\u00fcler davran\u0131\u015f\u0131n\u0131 benzersiz k\u0131lar. Buzun Y\u00fczeyde Kalmas\u0131n\u0131n Sebebi […]<\/p>\n","protected":false},"author":1,"featured_media":1519,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[128],"tags":[123,3,6,124,125],"yoast_head":"\n