# How do you use the following five values to calculate a lattice energy (in kilojoules per mole) for sodium hydride, NaH?

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Eea for H = -72.8 kJ/mol

Ei1 for Na = +495.8 kJ/mol

Heat of sublimation for Na= +107.3 kJ/mol

Bond dissociation energy for H2 = 435.9 kJ/mol

Net energy charge for the formation of NaH from its elements= -60kJ/mol

Eea for H = -72.8 kJ/mol

Ei1 for Na = +495.8 kJ/mol

Heat of sublimation for Na= +107.3 kJ/mol

Bond dissociation energy for H2 = 435.9 kJ/mol

Net energy charge for the formation of NaH from its elements= -60kJ/mol

##### 1 Answer

I like to do a Hess's Law calculation.

#### Explanation:

The lattice energy is the energy that is released when the ions in the gas phase come together to form the crystal lattice.

The target equation is

The equations given are

Now we set up the given equations to get the target equation.

The lattice energy of