pan class="w"> </span><span class="n"><span class="pre">ndarray</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pyiapws.Kw" title="Link to this definition">#</a></dt>
<dd><p>Compute the ionization constant of water Kw.
Validity range 273.13 K &lt;= T &lt;= 1273.15 K and 0 &lt;= p &lt;= 1000 MPa.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>T: int, float or 1d-array.</s