Heat 热1 kg of ice at -25 oC is dropped into 25 kg of water at 36 oC.To the nearest tenth of a degree Celsius,what is the final temperature of the mixture?1千克的冰 温度零下25° 丢进36°的25千克的水中 最后温度是多少?物理好

Heat 热1 kg of ice at -25 oC is dropped into 25 kg of water at 36 oC.To the nearest tenth of a degree Celsius,what is the final temperature of the mixture?1千克的冰 温度零下25° 丢进36°的25千克的水中 最后温度是多少?物理好
Heat 热
1 kg of ice at -25 oC is dropped into 25 kg of water at 36 oC.To the nearest tenth of a degree Celsius,what is the final temperature of the mixture?
1千克的冰 温度零下25° 丢进36°的25千克的水中 最后温度是多少?
物理好的同志们啊 救人一命胜造七级浮屠 0.-
我会多多积分的呐 0.-
OK everyone
告诉下我公式 也顺便告诉我为什么

Heat 热1 kg of ice at -25 oC is dropped into 25 kg of water at 36 oC.To the nearest tenth of a degree Celsius,what is the final temperature of the mixture?1千克的冰 温度零下25° 丢进36°的25千克的水中 最后温度是多少?物理好
LS做的是错误的
应该要设温度为T
要加上水的凝固-融化相变焓334KJ,水的比热为4200KJ/（KG*度）,而冰的为2100KJ/（KG*度）,因此原来冰的那部分变成水后要改用水的比热.
因此有M水*C水*(36-T）=M冰*C水*(T-0)+M冰*C冰*(0-（-25）)+334000
算得T=31.07度

设最后温度为T后,得
M水*C水*(36-T后)=M冰*C冰*(T后-(-25))

设最后温度为T后,得
M水*C水*(36-T后)=M冰*C冰*(T后-(-25))