What is the enthalpy of formation for CaO?
Table of Heats of Formation
Table of Contents
What is the enthalpy of formation for CaO?
Table of Heats of Formation
| Compound | ΔHf (kJ/mol) |
|---|---|
| CaCO3 | -1207.0 |
| CaO(s) | -635.5 |
| Ca(OH)2(s) | -986.6 |
| CaSO4(s) | -1432.7 |
What is the enthalpy of ca2+?
Absolute Enthalpies of Hydration of Gaseous Ions
| Ion | ΔHh°(kJ/mol) |
|---|---|
| NH4+ | -307 |
| Be2+ | -2484 |
| Mg2+ | -1926 |
| Ca2+ | -1579 |
What is the enthalpy of CaCO3?
-‐1206.9 kJ/mol
The standard enthalpies of formation for CaCO3(s): -‐1206.9 kJ/mol, CaCl2(aq): -‐877.1 kJ/mol, HCl(aq): -‐ 167.16 kJ/mol, H2O(l): -‐285.83 kJ/mol, CO2(g): -‐393.51 kJ/mol.
What is the heat of formation of CaCl2?
-795.80
Enthalpy of formation of solid at standard conditions (nominally 273.15 K, 1 atm.)
| ΔfH°solid (kJ/mol) | -795.80 |
| Method | Review |
| Reference | Chase, 1998 |
| Comment | |
|---|---|
| Data last reviewed in June, 1970 |
What is the enthalpy of formation of SO2?
-296.9kJ.
The standard enthalpy of formation of sulphur dioxide (SO2) is -296.9kJ.
What is the enthalpy of Cl2?
Selected ATcT enthalpy of formation based on version 1.122 of the Thermochemical Network
| Species Name | Formula | ΔfH°(298.15 K) |
|---|---|---|
| Dichlorine | Cl2 (g) | 0 |
| Chlorine atom | Cl (g) | 121.302 |
How do you calculate the enthalpy of formation of CaCO3?
CaCO3 → CaO + CO2 Hf CaCO3 = 1206.9 Hf CaO = – 635.1 kJmol Hf CO2 = – 393.5.
What is the enthalpy of formation of calcium hydroxide?
-985.2 kJ/mol
Thermodynamic properties
| Phase behavior | |
|---|---|
| Std enthalpy change of formation, ΔfHosolid | -985.2 kJ/mol |
| Standard molar entropy, Sosolid | 83.4 J/(mol K) |
| Heat capacity, cp | 87.5 J/(mol K) |
| Liquid properties |
What is the enthalpy of formation of C2H2?
Standard enthalpy of formation of C2H2 = +224 kJ/mole.
What is the enthalpy of h2?
Hydrogen. H2(g) 2.016. 0.
What is the entropy of calcium oxide?
It is an oxide that is basic in nature and forms salts when it comes in contact with an acid. This compound crystallizes in a cubic crystal lattice. The standard molar entropy associated with calcium oxide corresponds to 40 joules per mole kelvin.
What is calcium oxide (CaO)?
What is Calcium Oxide (CaO)? Calcium oxide, commonly known as lime, is a chemical compound with the formula CaO. Calcium oxide, also known as quicklime, is an alkaline substance that has been in use since the medieval age. It is believed that quicklime is one of the oldest chemicals known to the human race.
Is the reaction between calcium oxide and oxygen exothermic?
This reaction is reversible and exothermic in nature in the forward direction. Calcium oxide molecules contain one calcium cation (which holds a charge of +2) and one oxygen anion (which holds a charge of -2). The structure of calcium oxide is illustrated below.
What is the preparation of calcium oxide?
Preparation of Calcium Oxide. Calcium oxide can be produced by thermal decomposition of materials like limestone or seashells that contain calcium carbonate (CaCO 3; mineral calcite) in a lime kiln.
