化学笔记

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Posted: December 01, 2022

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现象:蜡烛熄灭了、高处的蜡烛后熄灭

分析:二氧化碳不支持燃烧、不能燃烧、密度比空气大

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现象:瓶子变瘪

分析:二氧化碳能溶于水

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无色:气体:无味:比空气大:能溶于水:不支持燃烧

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现象:纸花变红;纸花不变色;纸花不变色;纸花变红;纸花还原为之前的颜色。

分析:二氧化碳与水反应生成酸性物质,酸性物质能使紫色石蕊溶液变成红色。

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都要放热 >> 作燃料

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能产生温室效应的气体除二氧化碳外,还 有 臭 氧(O3)、 甲 烷(CH4)、氟氯代烷(商品名为氟利昂)等。

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P120 还会增加病虫害【危害】

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煤炉中的二氧化碳往上走

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向煤气中添加具有难闻气味的气体是为了提醒人们、防止煤气中毒事件发生;煤气泄漏时应开窗通风

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开始时先通CO,结束时先停止加热。尾气处理:点燃、气球收集。

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