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Bond energy of covalent O-H bond in water is:
  • a)
    Less than or equal to bond energy of hydrogen bond
  • b)
    Greater than bond energy of hydrogen bond
  • c)
    Less than bond energy of hydrogen bond
  • d)
    Equal to bond energy of hydrogen bond
Correct answer is option 'B'. Can you explain this answer?
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Bond energy of covalent O-H bond in water is:a)Less than or equal to b...
Hydrogen bonding causes the collective ground state of liquid water to have an energy lower than the ground state found in single gaseous molecules. The water hydrogen bond is a weak bond, never stronger than about a twentieth of the strength of the O-H covalent bond.
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Bond energy of covalent O-H bond in water is:a)Less than or equal to b...
Bond energy refers to the amount of energy required to break a bond between two atoms in a molecule. It is typically measured in kilojoules per mole (kJ/mol). In the case of water (H2O), the covalent O-H bond represents the bond energy between the oxygen atom and one of the hydrogen atoms.

The bond energy of the O-H bond in water is greater than the bond energy of a hydrogen bond.

Explanation:
The covalent O-H bond in water is a strong bond that holds the hydrogen atom to the oxygen atom. This bond is formed through the sharing of electrons between the atoms. The bond energy of the O-H bond in water is approximately 464 kJ/mol.

On the other hand, a hydrogen bond is a weak bond that occurs between a hydrogen atom in a polar molecule and an electronegative atom (usually nitrogen, oxygen, or fluorine) in another molecule. It is an attractive force between the partially positive hydrogen atom and the partially negative atom in the other molecule. Hydrogen bonds are responsible for many important properties of water, such as its high boiling point and surface tension.

The bond energy of a hydrogen bond is typically much weaker than that of a covalent bond. The energy required to break a hydrogen bond is generally in the range of 10-40 kJ/mol. This is significantly lower than the bond energy of the O-H bond in water.

Therefore, the bond energy of the covalent O-H bond in water is greater than the bond energy of a hydrogen bond.
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Attempt All sub parts from each question.Molecular Perspective In water, there are two types of molecules. Some molecules are at the surface, called exterior molecules, and some molecules are inside, called interior molecules. The interior molecules are attracted to all the molecules around them. The exterior molecules are attracted to only the other surface molecules and to those below the surface. So that the energy state of the molecules on the interior is much lower than that of the molecules on the exterior. The molecules always try to maintain a lower energy state and hence the exterior molecules experience a downward force. This force is known as cohesive force. As a result they try to maintain a minimum surface area, thus allowing more molecules to have a lower energy state. Thus surface tension is created. The water molecules attract one another due to the water molecule’s polar property. The hydrogen ends, which are positive in comparison to the negative ends of the oxygen, cause water to "stick " together. This is why there is surface tension. Water has very high surface tension. It is 72.8 milli newton per meter at 20°C.Q. The water molecules attract one another due to the water molecule’s

Attempt All sub parts from each question.Molecular Perspective In water, there are two types of molecules. Some molecules are at the surface, called exterior molecules, and some molecules are inside, called interior molecules. The interior molecules are attracted to all the molecules around them. The exterior molecules are attracted to only the other surface molecules and to those below the surface. So that the energy state of the molecules on the interior is much lower than that of the molecules on the exterior. The molecules always try to maintain a lower energy state and hence the exterior molecules experience a downward force. This force is known as cohesive force. As a result they try to maintain a minimum surface area, thus allowing more molecules to have a lower energy state. Thus surface tension is created. The water molecules attract one another due to the water molecule’s polar property. The hydrogen ends, which are positive in comparison to the negative ends of the oxygen, cause water to "stick " together. This is why there is surface tension. Water has very high surface tension. It is 72.8 milli newton per meter at 20°C.Q. The energy state of the interior molecules of a fluid is

Attempt All sub parts from each question.Molecular Perspective In water, there are two types of molecules. Some molecules are at the surface, called exterior molecules, and some molecules are inside, called interior molecules. The interior molecules are attracted to all the molecules around them. The exterior molecules are attracted to only the other surface molecules and to those below the surface. So that the energy state of the molecules on the interior is much lower than that of the molecules on the exterior. The molecules always try to maintain a lower energy state and hence the exterior molecules experience a downward force. This force is known as cohesive force. As a result they try to maintain a minimum surface area, thus allowing more molecules to have a lower energy state. Thus surface tension is created. The water molecules attract one another due to the water molecule’s polar property. The hydrogen ends, which are positive in comparison to the negative ends of the oxygen, cause water to "stick " together. This is why there is surface tension. Water has very high surface tension. It is 72.8 milli newton per meter at 20°C.Q. The tendency of water to maintain .............. surface area is known as surface tension.

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Bond energy of covalent O-H bond in water is:a)Less than or equal to bond energy of hydrogen bondb)Greater than bond energy of hydrogen bondc)Less than bond energy of hydrogen bondd)Equal to bond energy of hydrogen bondCorrect answer is option 'B'. Can you explain this answer?
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