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About This Item
Full Description
As part of ASHRAE research project 527, the heat capacity of lithium bromide and water solutions has been measured over the nominal range of 100 deg C to 200 deg C and 45% to 65% LiBr by mass. The measurements were done by the classic "method of mixing" implemented with a drop calorimeter. From tests using water as a standard reference substance and allowing for the accuracy with which the solutions can be compared, the ultimate accuracy of this procedure is estimated to be +/- 1.2%. Practical effects degrade the accuracy somewhat, and for the entire series of measurements the accuracy of the data is estimated to be +/- 5%. The resulting data agree well within three sets of measurements by other investigators but disagree substantially with two older data sets. A polynominal regression model is presented to represent the data in practical calculations.
KEYWORDS: properties, lithium bromide, water, solutions, high temperature, specific heat, measuring, accuracy, calorimeters, calculating