Problem: Aluminum oxide (Al2O3) is a widely used industrial abrasive (known as emery or corundum), for which the specific application depends on the hardness of the crystal. What does this hardness imply about the magnitude of the lattice energy? Would you have predicted from the chemical formula that Al2O3 is hard? Explain.

🤓 Based on our data, we think this question is relevant for Professor Mandziuk & Orr's class at NYU.

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Lattice energy is the enthalpy change that occurs when 1 mol of ionic solid separates into gaseous ions. Lattice energy tells us the strength of ionic interactions and has influence in melting point and hardness.

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Problem Details

Aluminum oxide (Al2O3) is a widely used industrial abrasive (known as emery or corundum), for which the specific application depends on the hardness of the crystal. What does this hardness imply about the magnitude of the lattice energy? Would you have predicted from the chemical formula that Al2O3 is hard? Explain.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Lattice Energy concept. You can view video lessons to learn Lattice Energy. Or if you need more Lattice Energy practice, you can also practice Lattice Energy practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Mandziuk & Orr's class at NYU.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.