Question

Water is added to a flask containing solid NH₄Cl. As the salt dissolves, the solution becomes colder.

Answer 1

The structure of a particle that forms crystals is characterized by a lattice, which is an ordered group of points. The crystal's unit cell can be located using the lattice points. Every particle (yellow) in the rough structure is the same.

Solution with Explanation :

Enthalpy of solution is the sum of lattice enthalpy and heat of hydration. It can be written as follows:

ΔΗsoln = + ΔΗlattice + ΔΗ hydr of the ions

Magnitude of lattice energy ( ΔH lattice ) of NH4Cl is larger than the combined ionic heats of hydration

ΔΗ hydr of the ions.

What is Lattice ?

A lattice is an ordered collection of points that characterizes a crystal-forming particle's structure. The lattice points help identify a crystal's unit cell. In the sketched structure, every particle (yellow) is the same.

Atomic lattice may refer to: In mineralogy, the arranging of atoms into a crystal structure is referred to as an atomic lattice.

A lattice is referred to as an atomic lattice in order theory if the underlying partial order is atomic. Atomic lattice in chemistry refers to the configuration of atoms in an atomic crystalline solid.

Properties of ionic Compounds:

• Ionic compounds are crystalline solids.
• They have high melting and boiling point.
• They do not conduct energy in solid-state but good electric conductors in their solutions.

What is ΔH ?

A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the system's internal energy to the product of its pressure and volume. It is a state function that is frequently employed in measurements of chemical, biological, and physical systems at constant pressure, which the sizable surrounding environment conveniently provides.

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