CaSO3 + 2HNO3 → Ca(NO3)2 + H2SO3
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The reaction of calcium sulfite and nitric acid yields calcium nitrate and sulfurous acid (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of calcium sulfite and nitric acid
General equation
- Salt of weak acidBrønsted base + Strong acidBrønsted acid ⟶ Salt of strong acidConjugate base + Weak acidConjugate acid
Oxidation state of each atom
- Reaction of calcium sulfite and nitric acid
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaSO3 | Calcium sulfite | 1 | Brønsted base | Salt of weak acid |
| HNO3 | Nitric acid | 2 | Brønsted acid | Strong acid |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca(NO3)2 | Calcium nitrate | 1 | Conjugate base | Salt of strong acid |
| H2SO3 | Sulfurous acid | 1 | Conjugate acid | Weak acid |
Thermodynamic changes
Changes in standard condition
- Reaction of calcium sulfite and nitric acid
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | – | 77.7 | – |
per 1 mol of | – | – | 77.7 | – |
per 1 mol of | – | – | 38.9 | – |
per 1 mol of | – | – | 77.7 | – |
per 1 mol of | – | – | 77.7 | – |
Thermodynamic data of reactants
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| CaSO3 (cr) | – | – | 101.38[1] | 91.71[1] |
| CaSO3 (cr) 0.5 hydrate | -1311.7[1] | -1199.23[1] | 121.3[1] | – |
| HNO3 (l) | -174.10[1] | -80.71[1] | 155.60[1] | 109.87[1] |
| HNO3 (g) | -135.06[1] | -74.72[1] | 266.38[1] | 53.35[1] |
| HNO3 (ai) | -207.36[1] | -111.25[1] | 146.4[1] | -86.6[1] |
| HNO3 (l) 1 hydrate | -473.46[1] | -328.77[1] | 216.90[1] | 182.46[1] |
| HNO3 (l) 3 hydrate | -1056.04[1] | -811.09[1] | 346.98[1] | 325.14[1] |
* (cr):Crystalline solid, (l):Liquid, (g):Gas, (ai):Ionized aqueous solution
Thermodynamic data of products
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| Ca(NO3)2 (cr) | -938.39[1] | -743.07[1] | 193.3[1] | 149.37[1] |
| Ca(NO3)2 (ai) | -957.55[1] | -776.09[1] | 239.7[1] | – |
| Ca(NO3)2 (cr) 2 hydrate | -1540.76[1] | -1229.11[1] | 269.4[1] | – |
| Ca(NO3)2 (cr) 3 hydrate | -1838.0[1] | -1471.7[1] | 319.2[1] | – |
| Ca(NO3)2 (cr) 4 hydrate | -2132.33[1] | -1713.15[1] | 375.3[1] | – |
| H2SO3 (ao) | -608.81[1] | -537.81[1] | 232.2[1] | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ S°, 101.38 J · K−1 · mol−1
- ^ Cp°, 91.71 J · K−1 · mol−1
- ^ ΔfH°, -1311.7 kJ · mol−1
- ^ ΔfG°, -1199.23 kJ · mol−1
- ^ S°, 121.3 J · K−1 · mol−1
- ^ ΔfH°, -174.10 kJ · mol−1
- ^ ΔfG°, -80.71 kJ · mol−1
- ^ S°, 155.60 J · K−1 · mol−1
- ^ Cp°, 109.87 J · K−1 · mol−1
- ^ ΔfH°, -135.06 kJ · mol−1
- ^ ΔfG°, -74.72 kJ · mol−1
- ^ S°, 266.38 J · K−1 · mol−1
- ^ Cp°, 53.35 J · K−1 · mol−1
- ^ ΔfH°, -207.36 kJ · mol−1
- ^ ΔfG°, -111.25 kJ · mol−1
- ^ S°, 146.4 J · K−1 · mol−1
- ^ Cp°, -86.6 J · K−1 · mol−1
- ^ ΔfH°, -473.46 kJ · mol−1
- ^ ΔfG°, -328.77 kJ · mol−1
- ^ S°, 216.90 J · K−1 · mol−1
- ^ Cp°, 182.46 J · K−1 · mol−1
- ^ ΔfH°, -1056.04 kJ · mol−1
- ^ ΔfG°, -811.09 kJ · mol−1
- ^ S°, 346.98 J · K−1 · mol−1
- ^ Cp°, 325.14 J · K−1 · mol−1
- ^ ΔfH°, -938.39 kJ · mol−1
- ^ ΔfG°, -743.07 kJ · mol−1
- ^ S°, 193.3 J · K−1 · mol−1
- ^ Cp°, 149.37 J · K−1 · mol−1
- ^ ΔfH°, -957.55 kJ · mol−1
- ^ ΔfG°, -776.09 kJ · mol−1
- ^ S°, 239.7 J · K−1 · mol−1
- ^ ΔfH°, -1540.76 kJ · mol−1
- ^ ΔfG°, -1229.11 kJ · mol−1
- ^ S°, 269.4 J · K−1 · mol−1
- ^ ΔfH°, -1838.0 kJ · mol−1
- ^ ΔfG°, -1471.7 kJ · mol−1
- ^ S°, 319.2 J · K−1 · mol−1
- ^ ΔfH°, -2132.33 kJ · mol−1
- ^ ΔfG°, -1713.15 kJ · mol−1
- ^ S°, 375.3 J · K−1 · mol−1
- ^ ΔfH°, -608.81 kJ · mol−1
- ^ ΔfG°, -537.81 kJ · mol−1
- ^ S°, 232.2 J · K−1 · mol−1