3-6 焦點

forces of attraction hold water molecules together the major factor determining water's distinctive properties
water exists as a liquid over a wide temperature range because of the hydrogen bonds. without water's high boiling point the oceans would have evaporated long ago
liquid water changes temperature slowly because it can store a large amount of heat without a large change in temperature this high heat storage capacity helps protect living organisms from temperature changes,moderates the earth's climate,and makes water an excellent coolant for car engines and power plants
it takes a large amount of energy to evaporate water because of the hydrogen bonds. water absorbs large amounts of heat as it change into water vapor and releases this heat as the vapor condenses back to liquid water. this help distribute heat throughout the world and determine regional and local climates. it also makes evaporation a cooling process -explaining why you feel cooler when perspiration evaporates from your skin

水分子之間會有引力而聚在一起是水的一種獨特性質
由於氫鍵的關係液態水存在在很寬的溫度範圍 很久以前沒有水的高沸點的海洋就已經消失
液態水的溫度變化緩慢，因為它可以存儲大量的熱量沒有大變化，氣溫高儲熱能力有助於保護活的生物體的溫度變化，溫和派地球的氣候，使水的一個很好的汽車發動機冷卻液和發電廠
它需要大量的能源來蒸發水由於氫鍵。水吸收了大量的熱量，因為它轉變成水蒸汽並釋放熱量的水汽凝結回到液態水。這幫助分發熱在世界各地，並確定區域和地方的氣候。這也使得蒸發冷卻過程中，解釋了為什麼你覺得涼爽汗水蒸發時從你的皮膚