这关键区别在浓度细胞和化学细胞之间,在浓度细胞中,两个半细胞的组成相似,而在化学细胞中,组成可能或可能不相似。
浓度细胞是一种电化学细胞。有两种类型的电化学细胞或化学细胞为galvanic cellsand电解细胞。浓度电池是一种电池。
CONTENTS
1。概述和关键差异
2。什么是浓度单元
3。什么是化学细胞
4。Side by Side Comparison – Concentration Cell vs Chemical Cell in Tabular Form
5。Summary
什么是浓度单元?
Concentration cell is a type of galvanic cell in which the two half cells of the cell are similar in composition. Therefore, we say the two half cells are equivalent. They only differ in concentration. The voltage produced by this cell is very small since this cell tends to obtain an equilibrium state. The equilibrium comes when the concentrations of the two half cells become equal.
浓度细胞通过减少系统的热力学自由能而产生电力。由于半细胞的组成相似,因此发生相同的反应,但却相反。因此,该过程增加了较低浓度细胞的浓度,并降低了较高浓度细胞的浓度。随着电流的流动,产生热能。该细胞吸收该能量作为热量。有两种类型的浓度细胞如下:
- Electrolyte concentration cell- 电极由相同的物质组成,半细胞包含具有不同浓度的相同电解质
- Electrode concentration cell– two electrodes (of the same substance) of different concentrations are dipped in the same electrolyte
什么是化学细胞
化学细胞,更精确地是一种电化学细胞,是一种可以通过自发化学反应产生电能的系统(设备)。此过程中涉及的化学反应称为氧化还原反应。这些反应通过化学物种之间的电子传递而发生。此外,氧化还原反应有两个半反应称为氧化反应和还原反应。While oxidation reactions always release electrons to the system, reduction reactions take electrons from the system. Thus, we can say that the two half-reactions occur simultaneously.
有两种类型的电化学细胞作为伏(电源)细胞和电解细胞。电化学细胞由两个半细胞组成。半反应发生在这两个半细胞中。此外,在细胞中发生的化学反应会导致两个半细胞之间的电势差异。
半细胞通常由电极和电解质组成。因此,完整的电化学电池具有两个电极和两个电解质。两个半细胞有时可能使用相同的电解质。如果有两个不同的电解质,则使用盐桥来维持电解质之间的接触。而且,这是通过使通过盐桥传递离子的通道来完成的。电子通过外部电路从一半电池流向另一个电池。我们称这两个电极阳极和阴极。
此外,氧化和还原反应发生in two electrodes separately. While the oxidation reaction occurs in the anode, the reduction reaction occurs in the cathode. Therefore, electrons are produced in the anode and they move from the anode to the cathode through the external circuit. The salt bridge helps to maintain the system neutral (electrically) by transferring ions through it in order to balance the electrical charges.
浓度细胞和化学细胞之间有什么区别?
浓度细胞是一种电化学细胞。这re are two types of chemical cells; they are the galvanic cells and electrolytic cells. The concentration cell is a type of galvanic cell. The key difference between concentration cell and chemical cell is that in concentration cells, the composition of two half cells is similar whereas, in chemical cells, the compositions may or may not be similar.
Below is a summary of the difference between concentration cell and chemical cell.
摘要 - 浓度细胞与化学细胞
浓度细胞是一种电化学细胞。有两种类型的化学(电化学)细胞可以作为电细胞和电解细胞。确切地说,浓度细胞是一种电池。浓度细胞和化学细胞之间的关键区别在于,在浓度细胞中,两个半细胞的组成相似,而在化学细胞中,组成可能或可能不相似。
参考:
1。Narendra Sriramula. “Chemical Cell.” Slideshare.net.在这里可用。
图片提供:
1。“Cell 3” By 473SHRUTHI V – Own work(CC BY-SA 4.0)通过下议院维基梅迪亚
2.格林格(Gringer)的“电源单元” - 文件:galvanische zelle.png,tinux(CC BY-SA 3.0)通过下议院维基梅迪亚
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