Which reaction shows the enthalpy change equal to the second ionization energy o
ID: 923460 • Letter: W
Question
Which reaction shows the enthalpy change equal to the second ionization energy of nitrogen? Which of the following represents the lattice energy of KCl(s)? Which one of the following is the most polar bond? Which of the following tonic solids would have the highest melting point? In Ba(CN)_2, the bonding is essentially: Which of the following species does not have the proper Lewis formula? Draw the Lewis dot structure for formaldehyde (CH_2O). Provide all resonance structures How many valence electrons are there? Which element is the central atom? What is the formal charge for each atom? What are the electronic pair and molecular geometries? What is the bond angle? What is the hybridization state of carbon?Explanation / Answer
Answer – 1) We know the second ionization energy of N means there is second electrons removed from the gaseous state, So there are total 2- charge on N, so the answer is e.
e. N-(g) -----> N2-(g) + e-
2) We know lattice energy means the energy given off when oppositely charged ions in the gas phase come together to form a solid called as lattice energy. So for the KCl lattice energy is like
K+(g) + Cl-(g) -----> KCl(s)
So form the given none of the option given, so answer is e. none of the above.
3) We know polar bond means the difference between electronegativies of both atoms is more than 0.5 called polar bond. As this difference more there is more polar bond. So most electronegative atom and less electronegative atom form more polar bond. So O is most electronegative atom and B is less electronegative atom, so B-O bond is more polar.
So, answer is d) B-O
4) We know as the molar mass and electronegativity atom increase melting point increase, si KF is stronger bond, since F is the most electronegative atom, so answer is a) KF
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