Physical properties of water, I

• Water melts at much higher temperature & boils at much higher temperature than other covalently bound but non-polar compounds with similar molecular weight

• CH4 - molecular weight = 16; melting temperature = -184°C; boiling temperature = -161°C

• H2O - molecular weight = 18; melting temperature = 0°C; boiling temperature = 100°C

• Hydrogen bonds cause molecules to cohere at higher temperatures

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