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Lydersen method
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<p>The Lydersen method is a <a href="/facts/Group_contribution_method/29UR7szr">group contribution method</a> for the estimation of critical properties temperature (<a href="/facts/Critical_temperature/pkM7RLJK"><i>T</i>c</a>), pressure (<a href="/facts/Critical_pressure/pkM7RLJK"><i>P</i>c</a>) and volume (<i>V</i>c). The method is named after <a href="/facts/Aksel_Lydersen/3vcTEGqX">Aksel Lydersen</a> who published it in 1955. The Lydersen method is the prototype for and ancestor of many new models like <a href="/facts/Joback_method/ooIpgSHL">Joback</a>, <a href="/facts/Klincewicz_method/mXQlpmeY">Klincewicz</a>, Ambrose, Gani-Constantinou and others. </p><p>The Lydersen method is based in case of the critical temperature on the <a href="/facts/Guldberg_rule/nBmwG5IY">Guldberg rule</a> which establishes a relation between the normal <a href="/facts/Boiling_point/E2BK9QoS">boiling point</a> and the <a href="/facts/Critical_temperature/pkM7RLJK">critical temperature</a>. </p>