Question

T1= 20 grade Celsius
T2=90 grade Celsius
Lamda=70 grade Celsius
M2=600g
____________________/__
m1=?
c1=4185 J/kg K
c2=920 J/kg K

Answer 1

Corpul 1 primeste caldura, iar 2 cedeaza.

m1 c1 (landa - t1)=m2 c2 (t2 - landa)

m2=600g=0.6kg

Deci:

m1=m2×c2×(t2-landa)/c1/(landa-t1)

Calculele le faci tu. Succes!