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【初中化学教材实验十六】溶解过程的热效应

  • 2026-03-30 00:27:43
【初中化学教材实验十六】溶解过程的热效应

广东江凤

【初中化学教材实验十六】

溶解过程的热效应

01教材知识点

沪科技版九年级全一册P5

实验背景

物质溶解于水的过程中，通常会伴有热效应。部分物质溶解时会释放热量，使溶液温度上升；部分物质溶解时会吸收热量，导致溶液温度下降；还有部分物质溶解时的热效应微弱，溶液温度无显著变化。明晰各类物质溶于水的吸热、放热特性，能够将这一科学原理切实应用于生活与生产实践，发挥实用指导价值。

02实验介绍

实验器材

【数字化仪器】威尼尔无线温度传感器

【其他】电子天平、100mL烧杯、50mL量筒、磁力搅拌站、铁夹、转子、氯化钠固体、碳酸氢钠固体、氢氧化钠固体

03实验过程

实验装置

实验视频

以下视频来源于
上海江凤

实验结论分析

结合实验测得的数据可知：氢氧化钠固体溶于水时会释放热量；碳酸氢钠固体溶于水时会吸收热量；氯化钠固体溶于水时，溶液温度基本保持不变。

04传感器的运用

上述内容是威尼尔初中化学教材实验的详细说明，如有任何问题，欢迎扫码关注微信官方公众号咨询，我们会及时为您答疑。本实验若有不完善之处，敬请您不吝指正，谢谢

-END-

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  1. CONNECT:[ UseTime:0.000927s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001332s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.040573s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.011623s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001538s ]
  6. SELECT * FROM `set` [ RunTime:0.024765s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001845s ]
  8. SELECT * FROM `article` WHERE `id` = 464252 LIMIT 1 [ RunTime:0.016331s ]
  9. UPDATE `article` SET `lasttime` = 1775567753 WHERE `id` = 464252 [ RunTime:0.038799s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.009914s ]
  11. SELECT * FROM `article` WHERE `id` < 464252 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.012947s ]
  12. SELECT * FROM `article` WHERE `id` > 464252 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006845s ]
  13. SELECT * FROM `article` WHERE `id` < 464252 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.111729s ]
  14. SELECT * FROM `article` WHERE `id` < 464252 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.108271s ]
  15. SELECT * FROM `article` WHERE `id` < 464252 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.016237s ]
0.594888s