TY - JOUR
T1 - Non-equilibrium thermodynamics of the gasliquid interface
T2 - Measurement of the Onsager heat of transport for nitrous oxide at the surface of water
AU - Packwood, Daniel M.
AU - Phillips, Leon F.
PY - 2010/4
Y1 - 2010/4
N2 - The Onsager heat of transport, Q*, for nitrous oxide at the surface of water has been measured by using high-resolution diode-laser spectroscopy to monitor the partial pressure of N2O as a function of the temperature difference across a 5-mm vapour gap above the water surface. The metal surface above the vapour gap was conditioned with ammonia prior to the measurements, to enable efficient thermal accommodation at that surface, which allowed the temperature difference to be as large as 15 K. We find Q* 6.6 ± 0.85 kJ mol1, so that Q*/RT is 2.9 at T 275.15 K. These experiments are a necessary preliminary to a planned series of measurements of Q* for CO2 at the surface of simulated sea water.
AB - The Onsager heat of transport, Q*, for nitrous oxide at the surface of water has been measured by using high-resolution diode-laser spectroscopy to monitor the partial pressure of N2O as a function of the temperature difference across a 5-mm vapour gap above the water surface. The metal surface above the vapour gap was conditioned with ammonia prior to the measurements, to enable efficient thermal accommodation at that surface, which allowed the temperature difference to be as large as 15 K. We find Q* 6.6 ± 0.85 kJ mol1, so that Q*/RT is 2.9 at T 275.15 K. These experiments are a necessary preliminary to a planned series of measurements of Q* for CO2 at the surface of simulated sea water.
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U2 - 10.1515/JNETDY.2010.005
DO - 10.1515/JNETDY.2010.005
M3 - Article
AN - SCOPUS:77953279306
VL - 35
SP - 75
EP - 84
JO - Journal of Non-Equilibrium Thermodynamics
JF - Journal of Non-Equilibrium Thermodynamics
SN - 0340-0204
IS - 1
ER -