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A liquid nitrogen boil-off calorimeter has been developed and utilized for surface energy measurements. The calorimeter is an all metal, multiwalled chamber which incorporates a means of precisely manostating the calorimetric fluid. The calorimeter also incorporates means for reducing the background pressures in the reaction vessel to 10−8 Torr. This calorimeter was designed to accept heat inputs in the range from 50 to 200 J. An achieved measurement precision of 0.05% in energy permits discrimination of small differences in energy states of the reactions occurring within the calorimeter. The calorimeter has been used to determine the surface energy of a metal film formed by evaporation from a wire.
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Gilbreath et al. (1970) studied this question.
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