Most people say that it is because the 3p orbital of chlorine when overlapping with the s orbital of hydrogen covers more area than when 4p orbital of bromine overlaps with the s orbital of hydrogen which makes bond between H and Cl more stronger than the bond between H and Br.
Why is the bond enthalpy of a Cl-Cl bond greater than Br-Br?
Explain why the bond enthalpy of a Cl-Cl bond is greater than that of a Br-Br bond. Bond is shorter or bonding pair closer to nucleus So attraction (between nucleus and) (to) bond pair is stronger Suggest why the electron affinity of chlorine is an exothermic change Net attraction between the chlorine nucleus and the extra electron
What is the bond enthalpy of Cl and I2?
The “bond enthalpy” refers to the energy of forming Cl-Cl or I-I bond from the free atoms in the ideal gas phase. The dispersion forces are what attract the Cl2 or I2 molecules to each other.
Why is the Cl-Cl bond stronger than the I-I bond?
It means Cl-Cl bond is much more stronger than I-I bond. And that’s because of the atomic radii of Chlorine and Iodine. Due to smaller atomic radius of the chlorine atoms the electrons in the outer shell are strongly attracted to the nucleus and hence the bond between them is stronger.
Which carbon halogen bond has the lowest bond enthalpy?
Which carbon halogen bond has the lowest bond enthalpy? Carbon - iodine has lowest bond enthalpy and bond dissociation energy , as bond enthalpy increases across the period nd decrease down the group due to increase in bond length Why is the bond dissociation energy of Cl higher than F?
Why is bond energy of chlorine is higher than that of bromine?
Yes, chlorine is more reactive than bromine because the chlorine atom has fewer shells and the electronic bonding is much stronger. The electrons are held closer to the nucleus. It is easier for chlorine to attract and hold electrons in its outer shell forming stronger bonds with other atoms.
Which forms a stronger bond to hydrogen Cl or Br?
Chlorine forms shorter, stronger, more stable bonds with hydrogen than bromine does.
Which of the following bonds is the strongest CF C Cl C Br CI?
Therefore, C – Cl bond is stronger than the C – I bond. So, the correct answer is “Option A”. Note: The strength of a bond between two atoms increases as the number of electron pairs in the bond increases. Generally, as the bond strength increases, the bond length decreases.
Why is the bond energy of chlorine greater than iodine?
Bond dissociation energy is defined as the energy required to break a particular bond into atoms. In general, halogens are diatomic molecules in which covalent bond is formed by overlapping of 'p' orbitals. Since atomic size increases from chlorine to Iodine, bond length increases from chlorine to iodine.
Which has a stronger bond Br2 or Cl2?
Br2 molecules are larger than Cl2 molecules, so more electrons are present in Br2 molecules. Therefore there are stronger van der waals forces between Br2 molecules than Cl2 molecules, so more energy is needed to melt Br2.
Which halogen has the strongest bond?
Bond energy of Cl2 is highest among all halogen molecules.
Which of the following bond is strongest FF Cl Cl I Br Br?
Hence, the strongest bond is the Cl-Cl bond. Therefore, the correct answer is option C. Note: Halogens form strong acids.
How do you find the greatest bond energy?
0:4314:49Bond Strength and Bond Length - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd as you go down the periodic table the atomic size increases. And so as the atom gets bigger theMoreAnd as you go down the periodic table the atomic size increases. And so as the atom gets bigger the bond length increases.
Which of the following bonds is the strongest a FF B II C Cl Cl Br Br?
F-F (although F has smallest size) bond is less stronger than C l-C l bond due to greater inter electronic repulsions.
Which species is the best oxidising agent Cl2 CL Br2 Br?
Chlorine has the ability to take electrons from both bromide ions and iodide ions. Bromine and iodine cannot reclaim those electrons from the chloride ions formed. This indicates that chlorine is a more powerful oxidizing agent than either bromine or iodine.
Which has the highest bond energy F2 Cl2 Br2 I2?
∴ Bond Energy order is Cl2>Br2>F2>I2.
Which of the following has maximum Cl Cl Br I?
Br has larger atomic size than Cl because the atomic size increases from top to bottom in a group.
Which has strongest bond to hydrogen?
FluorineSo if we increase the polarization between the atoms involved in the hydrogen bond, the hydrogen bond should become much stronger. Fluorine is the most electronegative element (3.98 on the Pauling scale) and because of this fluorine forms some of the strongest hydrogen Page 3 bonds.
Can Cl form hydrogen bonds?
Does Chlorine form Hydrogen Bonds? Even though chlorine is highly electronegative, the best answer is no, and in this class we will consider chlorine not to form hydrogen bonds (even though it has the same electronegativity as oxygen).
Does BR participate in hydrogen bonding?
Both nitrogen and bromine form covalent bonds with hydrogen atoms. Both nitrogen and bromine will likely have lone pairs of electrons and uneven distributions of charge when forming molecules with hydrogen.
Why is HBr not a hydrogen bond?
It is not considered to have appreciable intermolecular hydrogen bonding, as the electronegativity difference between H and Br is not large enough.
What is the theoretical enthalpy of lattice dissociation for silver chloride?
The theoretical enthalpy of lattice dissociation for silver chloride is +770 kJ mol-1. Explain why this value is less than the value for silver fluoride.
Which ion has a greater charge density?
Explain why the lattice dissociation enthalpy of magnesium chloride is greater than that of calcium chloride. The oxide ion has a greater charge / charge density than the chloride ion .
What is the attraction between the nucleus and the added electrons?
There is an attraction between the nucleus / protons and (the added) electron(s) Energy is released (when the electron is gained)
Which ion attracts (negative) O on a water molecule?
Mg2+ ion attracts (negative) O on a water molecule
Which bond is stronger, attraction or bond?
So attraction (between nucleus and) (to) bond pair is stronger
Why is the first electron affinity of oxygen an exothermic process?
Because fluoride (ion) smaller than chloride (greater charge density) In terms of the forces acting on particles, suggest one reason why the first electron affinity of oxygen is an exothermic process.