Heat of Formation of Cuprous Cyanide and Its Heat Capacity from 10 Deg to 400 Deg K

Details

• Personal Author:
  Brown MH ; Taylor AR Jr. ; Taylor EG
• Description:
  Using solution calorimetry, the following heats of reaction were determined: (1) nacn(c) + 1/2cu2o(c) + 129h2o(1), -> cucn(c) + naoh.128.5H2o, ah = -13.44+/-0.10 Kcal/mole. (2) Hcn(1) + naoh.128.5H2o, -> nacn(c) + 129.5H2o(1), ah = -2.52+/-0.02 Kcal/mole. From these reactions, the heats of formation for cucn(c) and hcn(1) were calculated to be 22.7+/-0.4 Kcal/mole and 24.9+/-0.4 Kcal/mole, respectively. Reaction 2 was made to check the consistency of literature values for heats of formation of hcn and nacn. Adiabatic calorimetric measurements between 10 deg and 400 deg k showed the entropy and heat capacity of cucn(c) to be 21.51+/- 0.06 Eu and 14.58+/-0.04 Cal/mole deg, respectively, at 298 deg k. A broad anomaly in the heat capacity was found in the temperature range 285 deg to 320 deg k. The heat of transition associated with this anomaly was less than 1 cal/mole, the sensitivity of the measurements. Work done in cooperation with the University of Alabama. [Description provided by NIOSH]
• Subjects:
  Chemistry Cyanides Hot Temperature Mining Occupational Health Safety Temperature
• Keywords:
  Mining-industry; Heat; Chemical-reactions; Calorimeters; Calorimetry; Temperature-measurement; Cyanides; Cyanide-compounds
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• Place as Subject:
  Alabama ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TURC - Tuscaloosa Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-12
• NIOSHTIC Number:
  nn:10008737
• NTIS Accession Number:
  PB-199042
• Citation:
  NTIS: PB 199 042 :1-12, 1971
• CAS Registry Number:
  Cuprous cyanide (CAS RN 544-92-3)
• Federal Fiscal Year:
  1971
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 199 042
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:14dd52d04e48fbcf9042418b8a67704f5e860885544897eb919c42faa1456fbb043c831c6f903ee84125a05a9360394d7d8bc3d3dac4118f3774859906dadc93
• Download URL:
  https://stacks.cdc.gov/view/cdc/237315/cdc_237315_DS1.pdf
• File Type:
  [PDF - 5.29 MB ]