
Which of the following has the highest lattice energy?
(a)
(b)
(c)
(d)
Answer
471.9k+ views
1 likes
Hint: We have to find out what is lattice energy, how it is measured, how the lattice is attached, on which factors it depends upon, how the factors affect the lattice energy and then compare them with the given ionic solids.
Complete answer:
Let’s start with lattice energy:
Lattice energy: The energy required to convert one mole of an ionic solid into gaseous ionic compound or the energy released by a crystalline solid when ions are combined to make a compound is known as Lattice energy.
It can be measured by using the Born-Haber Cycle.
The lattice energy is expressed in the terms of Kilojoules per mole ( ).
Factors affecting the Lattice energy:
(a) Charge on the ions
(b) Distance between the ions
(a) Charge on the ions: The lattices of the atoms are attached by the electrostatic forces of attraction. The electrostatic force of attraction is directly proportional to the magnitude of the charge held by the ions present in the ionic solid. Hence, larger the charge, larger the force of attraction and stronger the lattice, stronger the lattice stronger the energy required.
(b) Distance between the ions: As the lattices of the atoms are attached by the electrostatic forces of attraction. The distance between the ions decreases the electrostatic force of attraction. Hence, the distance between the ions is inversely proportional to the electrostatic force of attraction. Hence, smaller the size of the ions, greater the force of attraction, stronger the lattice stronger the energy required.
So, in the given options, cations and anions , all the atoms have same charge, as the cations are of the same group (Group 1), +1 charge and all the anions of the same charge as they are of same group (Group 17: Halogens), -1 charge. So, they don't differ by the charge on the ions factor.
So, we have to move on the second factor, distance between the ions, as in the given cations , has the smallest size and in the anions , has the smallest size. Hence, the compound having strongest lattice energy will be .
Hence, the correct option is (b) .
Note: Lattice energies are defined for ionic solids only. When we are calculating lattice energy, we can use Born-Haber Cycle and when we have to compare the Lattice energy of the ionic solid, we have to keep both the factors in mind.
Complete answer:
Let’s start with lattice energy:
Lattice energy: The energy required to convert one mole of an ionic solid into gaseous ionic compound or the energy released by a crystalline solid when ions are combined to make a compound is known as Lattice energy.
It can be measured by using the Born-Haber Cycle.
The lattice energy is expressed in the terms of Kilojoules per mole (
Factors affecting the Lattice energy:
(a) Charge on the ions
(b) Distance between the ions
(a) Charge on the ions: The lattices of the atoms are attached by the electrostatic forces of attraction. The electrostatic force of attraction is directly proportional to the magnitude of the charge held by the ions present in the ionic solid. Hence, larger the charge, larger the force of attraction and stronger the lattice, stronger the lattice stronger the energy required.
(b) Distance between the ions: As the lattices of the atoms are attached by the electrostatic forces of attraction. The distance between the ions decreases the electrostatic force of attraction. Hence, the distance between the ions is inversely proportional to the electrostatic force of attraction. Hence, smaller the size of the ions, greater the force of attraction, stronger the lattice stronger the energy required.
So, in the given options, cations and anions
So, we have to move on the second factor, distance between the ions, as in the given cations
Hence, the correct option is (b)
Note: Lattice energies are defined for ionic solids only. When we are calculating lattice energy, we can use Born-Haber Cycle and when we have to compare the Lattice energy of the ionic solid, we have to keep both the factors in mind.
Recently Updated Pages
Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 Social Science: Engaging Questions & Answers for Success

Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Physics: Engaging Questions & Answers for Success

Master Class 11 Biology: Engaging Questions & Answers for Success

Class 11 Question and Answer - Your Ultimate Solutions Guide

Trending doubts
Explain why it is said like that Mock drill is use class 11 social science CBSE

The non protein part of an enzyme is a A Prosthetic class 11 biology CBSE

Which of the following blood vessels in the circulatory class 11 biology CBSE

What is a zygomorphic flower Give example class 11 biology CBSE

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

The deoxygenated blood from the hind limbs of the frog class 11 biology CBSE
