Z1)
m1=1 kg
T1=90°C
T=50°C
T2= 30°C
cw=4200 J/(kgK)
m2=?
m1*cw*(T1-T)=m2*cw*(T-T2)
m2= (m1*(T1-T)) / (T-T2)
m2= (1*40)/20
m2= 2 kg
Z2)
T1=70°C
m1=0,5 kg
T2=28°C
m2=0,3 kg
T=?
m1*cw*(T1-T)=m2*cw*(T-T2)
m1*(T1-T)=m2*(T-T2)
m1*T1-m1*T=m2*T-m2*T2
m1*T1 +m2*T2=m2*T +m1*T
m1*T1 +m2*T2=T(m2 +m1)
T= (m1*T1 +m2*T2)/(m2 +m1)
T=(0,5*70+0,3*28)/(0,5+0,3)
T=54,25°C
