Correlation for the Vapor Pressure of Mercury

Published

September 12, 2006

Author(s)

Marcia L. Huber, Arno D. Laesecke, Daniel G. Friend

Abstract

We present a new correlation for the vapor pressure of mercury that is valid from the triple point to the critical point. The equation is a Wagner-type form, where the terms of the equation are selected using a simulated annealing optimization algorithm. In order to improve the reliability of the equation at low temperatures, heat capacity data were used in addition to vapor pressure data. We present comparisons with available experimental data and existing correlations. The estimated uncertainty at a coverage factor of two varies from 3 % near the triple point to 1 % for temperatures from 273 K to 400 K; 0.15 % for the intermediate temperature region from 400 K to the normal boiling point at 629.77 K; for temperatures above the normal boiling point but below about 900 K, it is 0.5 %; and for temperatures between 900 K and the critical point, we estimate that the uncertainty is 5 %.

Citation

Industrial and Engineering Chemistry Research

Volume

45

Issue

21

Pub Type

Journals

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Keywords

correlation, mercury, vapor pressure.

Citation

Huber, M. , Laesecke, A. and Friend, D. (2006), Correlation for the Vapor Pressure of Mercury, Industrial and Engineering Chemistry Research, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50348 (Accessed October 10, 2025)