Question

sea water freezes at lower temperature than distilled water but boil at higher temperature .give reason

Answer 1

because sea water is salty water there is found so many salt. and his freezing point is very low but distil water is fresh water there is not found any salt so his boiling point is so high.

Answer 2

Reasons:

• Sea water is composed mostly of salt. (Nacl) Due to presence of impurity of impurities and non volatile solids Boiling point increases and melting point decreases.  
• The number of water molecules free to become freeze decreases due to  the presence of impurities.  
• The freezing point depends upon the attraction between the molecules of the liquid.
• Boiling point depends upon the vapor pressure of the liquid.
• Salt absorbs heat greatly.

Hence, sea water freezes at lower temperature than distilled water but boils at higher temperature.

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