I don't know how to calculate, please help me.
John adds ice cubes, each of mass 0.01kg and at 0 C, to 0.1kg of hot coffee in a polystyrene cup at 70 C.
Find the least number of ice cubes needed to cool the cup of coffee to below 10 C when all the ice cubes added are completelyll melted. ( Assumem the specific hest capacity of coffee is the samem as that of water.)
Phy Question
2007-06-07 5:11 am
回答 (1)
2007-06-07 5:16 am
✔ 最佳答案
Energy gained by ice cube= Energy loss by hot coffee (0.01)(334000)n=(0.1)(4200)(70-10)
n=7.5
so, 8 ice cubes are needed
收錄日期: 2021-04-12 21:57:44
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