span class="default_value"><span class="pre">False</span></span></em><span class="sig-paren">)</span> <span class="sig-return"><span class="sig-return-icon">&#x2192;</span> <span class="sig-return-typehint"><span class="pre">ndarray</span><span class="w"> </span><span class="p"><span class="pre">|</span></span><span class="w"> </span><span class="pre">float</span></span></span><a class="headerlink" href="#pyiapws.kd" title="Link to this definition">#</a></dt>
<dd><p>Get the vapor-liquid constant for gas in 