# cobalt dichloride

**Formula:**Cl_{2}Co**Molecular weight:**129.839**CAS Registry Number:**7646-79-9**Information on this page:****Other data available:****Data at other public NIST sites:****Options:**

## Gas phase thermochemistry data

**Go To:** Top, Condensed phase thermochemistry data, Phase change data, References, Notes

**
Data compilation copyright
by the U.S. Secretary of Commerce on behalf of the U.S.A.
All rights reserved.
**

Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|

_{f}H°_{gas} | -22.40 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1973 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{gas,1 bar} | 71.343 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1973 |

### Gas Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + G

C_{p} = heat capacity (cal/mol*K)

H° = standard enthalpy (kcal/mol)

S° = standard entropy (cal/mol*K)

t = temperature (K) / 1000.

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Temperature (K) | 2000. - 6000. |
---|---|

A | 16.93010 |

B | -0.975152 |

C | 0.221666 |

D | -0.015399 |

E | -0.975840 |

F | -29.48069 |

G | 89.55500 |

H | -22.40010 |

Reference | Chase, 1998 |

Comment | Data last reviewed in June, 1973 |

## Condensed phase thermochemistry data

**Go To:** Top, Gas phase thermochemistry data, Phase change data, References, Notes

**
Data compilation copyright
by the U.S. Secretary of Commerce on behalf of the U.S.A.
All rights reserved.
**

Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|

_{f}H°_{liquid} | -64.892 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1973 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{liquid,1 bar} | 35.612 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1973 |

Quantity | Value | Units | Method | Reference | Comment |

_{f}H°_{solid} | -74.701 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1973 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{solid} | 26.114 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1973 |

### Liquid Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + G

C_{p} = heat capacity (cal/mol*K)

H° = standard enthalpy (kcal/mol)

S° = standard entropy (cal/mol*K)

t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) | 1013. - 2000. |
---|---|

A | 23.70010 |

B | -7.116951×10^{-8} |

C | 4.226970×10^{-8} |

D | -8.566530×10^{-9} |

E | -5.434491×10^{-9} |

F | -73.51150 |

G | 60.90251 |

H | -64.89350 |

Reference | Chase, 1998 |

Comment | Data last reviewed in June, 1973 |

### Solid Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + G

C_{p} = heat capacity (cal/mol*K)

H° = standard enthalpy (kcal/mol)

S° = standard entropy (cal/mol*K)

t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) | 298. - 1013. |
---|---|

A | 18.95540 |

B | 3.414871 |

C | -1.504230 |

D | 0.314977 |

E | -0.096273 |

F | -80.81439 |

G | 47.55741 |

H | -74.70010 |

Reference | Chase, 1998 |

Comment | Data last reviewed in June, 1973 |

## Phase change data

**Go To:** Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References, Notes

**
Data compilation copyright
by the U.S. Secretary of Commerce on behalf of the U.S.A.
All rights reserved.
**

### Antoine Equation Parameters

log_{10}(P) = A − (B / (T + C))

P = vapor pressure (atm)

T = temperature (K)

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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|

1043. - 1323. | 4.11271 | 4838.145 | -146.305 | Stull, 1947 | Coefficents calculated by NIST from author's data. |

## References

**Go To:** Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Notes

**Chase, 1998**

Chase, M.W., Jr.,
*NIST-JANAF Themochemical Tables, Fourth Edition*,
**J. Phys. Chem. Ref. Data, Monograph 9**, 1998, 1-1951. [all data]

**Stull, 1947**

Stull, Daniel R.,
*Vapor Pressure of Pure Substances. Organic and Inorganic Compounds*,
**Ind. Eng. Chem.**, 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]

## Notes

**Go To:** Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References

- Symbols used in this document:

S° _{gas,1 bar}Entropy of gas at standard conditions (1 bar) S° _{liquid,1 bar}Entropy of liquid at standard conditions (1 bar) S° _{solid}Entropy of solid at standard conditions _{f}H°_{gas}Enthalpy of formation of gas at standard conditions _{f}H°_{liquid}Enthalpy of formation of liquid at standard conditions _{f}H°_{solid}Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69:
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