| (1) $10$ | (2) $15$ | (3) $20$ | (4) $25$ |
\textbf{74--} In a reservoir, 100 grams of ice at zero degrees Celsius is at atmospheric pressure. We supply 100°C steam to the reservoir until all the ice melts. How many grams of steam are absorbed by the reservoir? (In this experiment, $J = 6540\ \frac{\text{J}}{\text{g}}$ grams of heat are absorbed by the reservoir, and $L_F = 336\ \frac{\text{J}}{\text{g}}$, $L_V = 2256\ \frac{\text{J}}{\text{g}}$, $c_{\text{water}} = 4200\ \frac{\text{J}}{\text{kg·K}}$.)
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(1) $10$ & (2) $15$ & (3) $20$ & (4) $25$
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