<p>A steam engine intakes 50 g of steam at <span class="equation">\(100^0C\)</span> per minute and cools it down to <span class="equation">\(20^C\)</span>. If latent heat of vaporization of steam is 540 cal <span class="equation">\(g^{-1}\)</span>, then the heat rejected by the steam engine per minute is __________&nbsp;&nbsp;<span class="equation">\(\times10^3 \)</span>​​​​​​​cal.</p>

<p>(Given : specific heat capacity of water : 1 cal&nbsp;<span class="equation">\(g^{-1}\)</span>&nbsp;<span class="equation">\(^0C^{-1}\)</span>)​​​​​​​​​​​​​​</p>