 or water (False). Default to False.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><dl class="simple">
<dt>kh: float or 1d-array</dt><dd><p>Henry constant in MPa.</p>
</dd>
</dl>
</dd>
</dl>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="pyiapws.ngases">
<span class="sig-name descname"><span class="pre">ngases</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">heavywater</