What is the standard heat of formation of Al2O3?
-1676.7
Standard Enthalpy of Formation
| Compound | delta Hf (kJ/mol) |
|---|---|
| Al2O3(s) | -1676.7 |
| CO2(g) | -393.5 |
| H2O(l) | -285.8 |
| NaOH(s) | -425.6 |
What is the heat of formation of aluminum oxide?
– 1675.7 kJ/mol
In addition to data available in your textbook, the following thermodynamic values will be of use: the second electron affinity for oxygen is – 779.6 kJ/mol, the sublimation energy for Alis 330.0 kJ/mol, and the heat of formation of aluminum oxide is – 1675.7 kJ/mol.
How much heat is released per mole of Al2O3 produced?
This value tells you that when 1 mole of aluminium oxide is formed at standard conditions from its constituent elements in their most stable form, 1676 kJ of heat are being given off.
What is the heat of formation of Aluminium oxide under standard conditions?
Thermodynamic properties
| Phase behavior | |
|---|---|
| Std enthalpy change of formation, ΔfHosolid | -1675.7 kJ/mol |
| Standard molar entropy, Sosolid | 50.92 J/(mol K) |
| Heat capacity, cp | 89.7248 J/(mol K) |
| Liquid properties |
What type of bond is Al2O3?
covalent
Aluminium oxide (Al2O3) is not an ionic compound. It is a covalent compound. Visit BYJU’S – The Learning App to know about covalent bonds in detail.
What is the enthalpy of formation of Al2O3 s Al2O3 S?
2Al(s) + 3/2 O2 (g) → Al2O3 (s) ΔH° = -1669.8 kJ/mol 2.
How do you calculate heat evolved per mole?
Answer
- Calculate the heat released, q, in joules (J), by the reaction: q = mass(water) × specific heat capacity(water) × change in temperature(solution)
- Calculate the moles of solute (NaOH(s)): moles = mass ÷ molar mass.
- Calculate the enthalpy change, ΔH, in kJ mol-1 of solute:
What are the standard enthalpies of Al2O3 and Cao?
The standard enthalpies of formation of Al2O3 and CaO are –1675 kJ mol–1 and –635 kJ mol–1 respectively.
What is the enthalpy of formation of Fe2O3?
Selected ATcT enthalpy of formation based on version 1.118 of the Thermochemical Network Correspondingly, what is the standard enthalpy of formation of Fe2O3? The standard heat of formation of Fe2O3(s) is 824.2kJ/mol. What do you mean by standard enthalpy of formation?
Which is insoluble in water aluminium oxide or Al 2 O 3?
Aluminium oxide in its powdered form. Al 2 O 3 is an electrical insulator but has a relatively high thermal conductivity (30 Wm−1K−1) for a ceramic material. Aluminium oxide is insoluble in water.
How is the structure of alumina related to temperature?
The structure of molten alumina is temperature dependent and the fraction of 5- and 6-fold aluminium increases during cooling (and supercooling), at the expense of tetrahedral AlO 4 units, approaching the local structural arrangements found in amorphous alumina.