\textbf{196.} Several grams of ice at $50°C$ below zero are placed on $450$ grams of water at $50°C$ Celsius. After reaching thermal equilibrium, $520$ grams of water at zero degrees Celsius is created. How much heat is generated in the container? (Heat loss is negligible, and $L_f = 336000\,\dfrac{\text{J}}{\text{kg}}$, $C_{\text{water}} = 4200\,\dfrac{\text{J}}{\text{kg.K}}$)
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(1) $70$ \hfill (2) $250$ \hfill (3) $300$ \hfill (4) $320$
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