EVALUATING THE EFFECT OF HEAT-EXCHANGER GAS IN A CALORIMETER ON THE ERROR IN MEASUREMENT OF SPECIFIC HEAT

摘要

The error in measuring heat capacity owing to heat exchange of the gas during the stage of determining the thermal equivalent of the empty calorimeter is discussed. A correct formula is obtained for estimating the correction to the measured heat capacity of a test sample and the error arising from neglect of the correction for the heat-exchanger gas is evaluated numerically. Numerical estimates of the error are obtained for the KA-S4 standard calorimeter contained in the State Primary Standard GET 60-2019 for the unit of specific heat in solids.