问题补充说明：想得到6kg50℃的温水，而把25℃的冷水和100℃的开水混合，问需用冷丶开水各多少?·········································································································
设用xkg冷水，(6-x)kg热水
Q末=Cm10△t=4.2X10^3X6X50=1.26X10^6J
Q冷=Cx△t=来自x`1.05X10^360问答5J
Q热=C(6-x)△t=(6-x)`4.2X10^5
Q热还按酒系践源皇钱+Q冷=Q末
x=4kg
6-x区农角东杆其路害海=2kg
标签：练习题,比热容
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