5. A Styrofoam container used as a picnic cooler contains a block of ice at 0 °C. If 225 grams of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 10⁵ J/kg).
詳解 (共 1 筆)
助人為本
詳解 #7418198
所以題目說冰塊在0度c
然後有225g的冰在1小時內融化
所以其所產生的熱量不是拿來升溫,而是融化所需
所以代融化熱的公式

然後要算P
就是把Q/t
Q=mL
最後要記得換成秒/3600
