What is the lattice enthalpy of NaF?
Table of Contents
What is the lattice enthalpy of NaF?
Lattice Energies (E
| Compound | E (kJ/mol) |
|---|---|
| NaH | 811 |
| NaF | 904 |
| NaCl | 769 |
| NaBr | 736 |
Is Lattice enthalpy the same as enthalpy of formation?
Lattice energy is the energy gained when gaseous forms of ionized elements come together. It would be the same as enthalpy of formation if we had started with already ionized elements, but the elements do not come as ions naturally.
Is lattice energy and lattice enthalpy same?
Lattice energy can be measured as the amount of energy required to break a bond between solid ions into a gas. Lattice enthalpy is the enthalpy change from when the solid structure is formed or broken.
Does NaF have higher lattice energy than KF?
The correct option is : b NaFExplanation:For compounds containing ions of same charge lattice energy increases as the size of ions decreases. Thus NaF has highest lattice energy. Arrange LiF, NaF, KF, RbF and CsF in increasing order of their lattice energies.
How is lattice enthalpy calculated?
Lattice Enthalpy – The lattice enthalpy of a crystalline solid is a measure of the energy released when the ions are combined to make this compound. The lattice enthalpy is indirectly determined by the use of the Born-Haber Cycle. This procedure is based on Hess’s law.
Why is lattice enthalpy negative?
The formation of a crystal lattice is exothermic, i.e., the value of ΔHlattice is negative because it corresponds to the coalescing of infinitely separated gaseous ions in vacuum to form the ionic lattice.
What is lattice enthalpy How do you calculate the lattice enthalpy of NaCl by using Born Haber cycle?
1 Answer
- ∆Hf = heat of formation of sodium chloride = 411.3 kJ mol-1
- ∆H1 = heat of sublimation of Na(s) = 108.7 kJ mol-1
- ∆H2 = ionisation energy of Na(s) = 495 kJ mol-1
- ∆H3 = dissociation energy of Cl2(s) = 244 kJ mol-1
- ∆H4 = Electron affinity of Cl(s) = – 349 kJ mol-1
- U = lattice energy of NaCl.
How does lattice energy differ from the heat of formation What are the factors on which lattice energy depend upon?
This model emphasizes two main factors that contribute to the lattice energy of an ionic solid: the charge on the ions, and the radius, or size, of the ions. The effect of those factors is: as the charge of the ions increases, the lattice energy increases. as the size of the ions increases, the lattice energy decreases.
Which has more lattice energy LiF or NaF?
LiF having more lattice energy than NaF. Size of Na>Li . In case of NaF , distance between Na and F is larger in comparision to Li-F. As distance between Li and F is smaller , force of attraction between Li and F is more .