Si	P	S
Ge	As	Se
Sn	Sb	Te

Arsenic - ₃₃As: thermochemistry and thermodynamics

Temperatures

Melting point: 1090 [817 °C (1503 °F)] (under pressure) K
Boiling point: 887 [614 °C (1137 °F)] (sublimes) K
Liquid range: (no liquid phase at normal pressure) K
Critical temperature: 1700 [1427 °C (2601 °F)] K
Superconduction temperature: (no data) K

Image showing periodicity of melting point for the chemical elements as colour-coded squares on a periodic table grid.

Enthalpies

Enthalpy of fusion: 27.7 kJ mol^-1
Enthalpy of vaporisation: 32.4 (sublimation) kJ mol^-1
Enthalpy of atomisation: 302 kJ mol^-1

Thermodynamic data

This table gives a few thermodynamic data for arsenic. Most values are those given in the NBS technical notes (reference 1) after conversion from the units used within those notes. Values labelled with an asterisk (*) are Committee on Data for Science and Technology (CODATA) agreed values for the thermodynamic properties of key chemical substances (reference 2). These values are published in a number of places including the WWW (reference 3).


State	Δ_fH°	Δ_fG°	S°	C_pH	H°_298.15‑H°₀
Units	kJ mol^‑1	kJ mol^‑1	J K^‑1 mol^‑1	J K^‑1 mol^‑1	kJ mol^‑1
Solid (α	0	0	35	24.6	5.13
Solid (γ	15
Gas	303	261	174.1	20.79	6.20

Notes

This tables gives a few thermodynamic data. Most values are those given in the NBS technical notes (reference 1) after conversion from the units used within those notes. Values labelled with an asterisk (*) are Committee on Data for Science and Technology (CODATA) agreed values for the thermodynamic properties of key chemical substances (reference 2). These values are published in a number of places including the WWW (reference 3).

References