m1c1(t-t1)=Lm2+m2c1(t2-t)
m1c1t-m1c1t1=Lm2+m2c1t2-m2c1t
t=(Lm2+m2c1t2+m1c1t1)/c1(m1+m2)=
=(2.3*10(6)Дж/кг*0.2кг+0.2кг*4200Дж/кг град*100 град+1.5кг*4200Дж/кг град*15 град)/4200Дж/кг град(1.5кг+0.2кг)=638500/7140=89.4 градуса
m1c1(t-t1)=Lm2+m2c1(t2-t)
m1c1t-m1c1t1=Lm2+m2c1t2-m2c1t
t=(Lm2+m2c1t2+m1c1t1)/c1(m1+m2)=
=(2.3*10(6)Дж/кг*0.2кг+0.2кг*4200Дж/кг град*100 град+1.5кг*4200Дж/кг град*15 град)/4200Дж/кг град(1.5кг+0.2кг)=638500/7140=89.4 градуса