>water has highest density(1000 kg/m^3) at liquid state 4 deg centigrade
>and ice has little bit low density(917 kg /m^3) compare to water at solid state 0 deg centigrade
>i.e weight of water is more than weight of ice
>thats why ice floats in water (abt 1/9 th portion) because by using 9 litres of water we can make 10 litres of ice
>GENERALLY all CHEMICAL ELEMENTS OTHER THAN WATER DENSITY(molecules/cubic mtr) IS INBRESES WHEN TEMPERATURE IS REDUCES
>BUT water has highest density at 4 deg centigrade
if we reduce temperature means contest to ice but reduce density&incrise the temperature its covert to steam and less density
>like ice CARBON DI OXIDE ALSO FORMS ICE CALLED "DRY ICE"
>WE can freeze carbon di oxide in high pressure means it forms dry ice.
>i.e generally CO2 structure is O=C=O LINEAR BUT DRY ICE FORMS LIKE WATER see in attachment fig.
>can you heat dry ice means its covert solid to gas state but ice covert solid to liquid state thats diff
>so dry ice used as cooling agent and use all refrigerators&storage of foods.
No comments:
Post a Comment