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段考題目請教(很急)

Mar 22nd 2014, 22:38

1.
水到零度時放熱20*1*60cal=1200cal可以融化1200g/80=15g的冰，此時全部熱平衡，所以有水20g+15g=35g
所以答案35g

2.
冰變成水時吸熱80*20cal=1600cal可以讓水降溫1600度/80=20度，所以變成0度20g的水和60度80g的水熱平衡，所以最後48度
所以答案48度C

參考資料 xu3

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