【2017年整理】3.4升华与凝华.ppt

3.4 升华与凝华 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 视频：大厅里的雪花 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 气态 汽化 液化 固态 液态 熔化 凝固 升华 凝华 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 视频：碘的升华与凝华 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 生活中的升华现象 放在衣柜里的樟脑丸变小，最后消失。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 冬天湿衣服结冰，几天后慢慢变干。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 生活中的凝华现象 冬天，夜间地表的温度特别低，水蒸气聚集在植物表面凝华为小冰晶，因此形成霜。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 在寒冷的冬季，室内外温差较大，室内温度较高的水蒸气在门窗玻璃内表面遇冷直接凝华，形成冰花。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 雾凇，也称树挂。由空气中的水蒸气凝华而形成，一天中观赏雾淞的最佳时间是早上，因为雾淞是在早上形成的，一般可以维持到11、12点。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 干冰 　　以－78.5oC存在的固体二氧化碳。在常温下可以直接升华变成二氧化碳气体，并且吸收大量的热量。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 人工降雨 向云层中输送干冰，靠干冰升华吸热使云层温度降低。 当很久未下雨时云层中有大量的水蒸气，水蒸气遇冷液化为小水滴，小水滴聚合为大水滴下落，从而形成降雨。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 舞台效果 舞台上干冰瞬间升华，从周围吸热，导致温度下降，周围的水蒸气遇冷液化成小水珠或凝华成小冰晶悬浮在空气中，即我们所见到烟雾。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 水蒸气 水 冰 液化 汽化 熔化 凝固 升华 凝华 想想议议 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0