Abstract
This article describes a scanning ratio calorimeter that has been developed for studying multilayer adsorbed films. The scanning technique presented is able to accumulate highly precise data much more quickly than other calorimetric techniques. The rms noise in the total heat capacity of the sample cell is 0.02% at 70 K and 0.04% at 120 K for scan rates of 2 K/h. Sources of error in the heat capacity measurement are analyzed in detail. The calorimeter is completely automated and can be operated continuously using a personal computer.
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