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The answer is : Magma with low viscosity. It makes for a weak volcanic eruption. <span>If the </span>viscosity<span> is </span>low (thin)<span>, non-explosive eruptions usually begin with fire fountains due to release of dissolved gases. When </span>magma<span> reaches the surface of the earth, it is called lava. </span>
In an orderly, repeating, three-dimensional pattern called a crystal lattice.
Here are the given:
<span>ΔHf° = –423 kJ/mol
</span> ΔHsub = 119 kJ/mol
IE = 469 kJ/mol
ΔHEA = –301 kJ/mol
BE = 161 kJ/mol
The lattice energy of the compound is solved using the formula:
U = <span>ΔHf° - </span>ΔHsub - BE - IE - ΔHEA
U = -423 - 119 - 161 - 469 - (-301)
U = -871 kJ/mol
Therefore, the lattice energy is 871 kJ/mol (released).
