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Which Statement About Hydrogen Bonds Is True
On the main words of hydrogen bonding
The hydrogen bond is the key to chemistry. If you want to understand its nature, you must investigate it in detail.
Or ask: "Which statement about hydrogen bonds is true?" Gai wants to study the true meaning of hydrogen bonds.
First, hydrogen bonds are not covalent bonds and the like. Covalent bonds, atoms are joined by a common electron pair. However, hydrogen bonds are weak interactions between molecules or specific atoms within molecules. Hydrogen atoms are connected to atoms with large electronegativity and small radius (such as fluorine, oxygen, nitrogen, etc.), and the complex is attracted to another atom with large electronegativity. This is different from covalent bonds. Therefore, hydrogen bonds are covalent bonds, not also.
Second, the force of hydrogen bonding is stronger than the van der Waals force, but inferior to the covalent bond. Van der Waals force is a weak interaction that generally exists between molecules, maintaining the aggregation state of molecules. The hydrogen bond is slightly stronger due to the unique properties of hydrogen atoms, and has a great influence on the melting point and solubility of substances. It is wrong to say that the hydrogen bond force is weaker than the van der Waals force.
Third, the formation of hydrogen bonds is related to many properties of substances. For water, there are many hydrogen bonds between molecules, so that the melting boiling point of water is higher than that of hydrides of the same main group. And because of hydrogen bonds, water can be miscible with many substances containing electronegative large atoms. If the effect of hydrogen bonds on the properties of substances is ignored, there is no chemistry.
To sum up, if you want to know "Which statement about hydrogen bonds is true?", you must understand the nature, strength and effect of hydrogen bonds on the properties of matter. In this way, you can get the correct solution, which is gradually becoming clear in the way of chemistry.
The hydrogen bond is the key to chemistry. If you want to understand its nature, you must investigate it in detail.
Or ask: "Which statement about hydrogen bonds is true?" Gai wants to study the true meaning of hydrogen bonds.
First, hydrogen bonds are not covalent bonds and the like. Covalent bonds, atoms are joined by a common electron pair. However, hydrogen bonds are weak interactions between molecules or specific atoms within molecules. Hydrogen atoms are connected to atoms with large electronegativity and small radius (such as fluorine, oxygen, nitrogen, etc.), and the complex is attracted to another atom with large electronegativity. This is different from covalent bonds. Therefore, hydrogen bonds are covalent bonds, not also.
Second, the force of hydrogen bonding is stronger than the van der Waals force, but inferior to the covalent bond. Van der Waals force is a weak interaction that generally exists between molecules, maintaining the aggregation state of molecules. The hydrogen bond is slightly stronger due to the unique properties of hydrogen atoms, and has a great influence on the melting point and solubility of substances. It is wrong to say that the hydrogen bond force is weaker than the van der Waals force.
Third, the formation of hydrogen bonds is related to many properties of substances. For water, there are many hydrogen bonds between molecules, so that the melting boiling point of water is higher than that of hydrides of the same main group. And because of hydrogen bonds, water can be miscible with many substances containing electronegative large atoms. If the effect of hydrogen bonds on the properties of substances is ignored, there is no chemistry.
To sum up, if you want to know "Which statement about hydrogen bonds is true?", you must understand the nature, strength and effect of hydrogen bonds on the properties of matter. In this way, you can get the correct solution, which is gradually becoming clear in the way of chemistry.
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