Thermodynamic properties of cuprous and cupric sulfides.

Details

• Personal Author:
  Ferrante, Michael J. ; Pankratz LB ; Stuve, J. M.
• Description:
  Low-temperature heat capacities of cu2s(c) and cus(c) have been measured from 5 to 310 k with an adiabatic calorimeter. The results yielded s deg.298 = 27.76 For cu2s and s deg.298 = 16.05 For cus, where s deg.298 is the standard entropy at 298.15 K in cal k-1mol-1 (1 calth = 4.184 J). High-temperature relative enthalpies have also been measured with a copper-block calorimeter from 298 to 1,600 k for cu2s and from 298 to 780 k for cus. Two solid-solid transitions have been observed for cu2s upon heating, the first at 376 k with an isothermal heat absorption of 865 cal mol-1, and the second at 720 k with an isothermal absorption of 280 cal mol-1. The enthalpy of fusion at 1,400 k was 3,070 cal mol-1. No solid-solid phase transitions were observed for cus from 5 to 780 k. All related thermodynamic properties have been tabulated. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• ISSN:
  0018-1536
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Oregon ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  77-90
• Volume:
  14
• NIOSHTIC Number:
  nn:10006808
• Citation:
  High Temp Sci 1981 Jan; 14:77-90
• Federal Fiscal Year:
  1981
• Peer Reviewed:
  False
• Source Full Name:
  High Temperature Science
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/240306/cdc_240306_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]