高一化学必须修读二2_3_2.ppt

第2课时　化学反应的限度和条件的控制 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 课堂互动讲练 探究整合应用 知能优化训练 第2课时 课前自主学案 学习目标 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1.认识可逆反应及其特点。 2.了解并会判断化学平衡状态。 3.初步了解化学反应条件的控制。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 一、化学反应的限度 1．可逆反应 (1)定义：在同一条件下_______________和 _______________均能进行的化学反应。 正反应方向 逆反应方向 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. (2)特点 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 思考感悟 【提示】　(1)二者不属于可逆反应，因为可逆反应是在相同条件下进行的，而上述两反应的反应条件不同。 (2)可逆反应不能进行到底，故不能生成2 mol NH3。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2．化学平衡状态——化学平衡 (1)化学平衡的建立 ①反应开始时：v(正)最大，v(逆)为____。 ②反应过程中：反应物浓度逐渐减小→v(正)逐渐_______，生成物浓度逐渐增大→v(逆)从0开始逐渐________。 ③反应达到平衡时：v(正)____ v(逆)，反应物和生成物各组分浓度不再改变。 (2)化学平衡建立过程中化学 反应速率的变化图象 0 减小 增大 ＝ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation o