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Ten grams of ice at \( -20^{\circ} \mathrm{C} \) is to be changed to steam at \( 130^{\circ} \mathrm{C} \). The specific heat of both ice and steam is \( 0.5 \mathrm{cal} / \) \( \left(\mathrm{g}^{\circ} \mathrm{C}\right) \). The specific heat of water is \( 1.00 \mathrm{cal} /(\mathrm{g} \mathrm{K}) \). The heat of fusion is \( 80 \mathrm{cal} / \mathrm{g} \) and the heat of vaporization is \( 540 \mathrm{cal} / \mathrm{g} \). The entire process requires
(A) \( 750 \mathrm{cal} \)
(B) \( 1250 \mathrm{cal} \)
(C) \( 6950 \mathrm{cal} \)
(D) \( 7450 \mathrm{cal} \)
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