Respostas

2014-05-26T16:22:04-03:00
Fácil, observe:
Q1 + Q2 = 0
m * c * ΔT + m * c * ΔT = 0
100 * 1 * (T - 20) + 200 * 1 * (T - 80) 0
100T - 2000 + 200T - 16000 = 0
300T - 18000 = 0
300T = 18000
T = 18000/300
T = 60ºC

Ou seja, a mistura atinge o equilíbrio térmico a 60ºC
5 3 5
2014-05-26T17:02:48-03:00
Q1 + Q2 = 0
m * c * ΔT + m * c * ΔT = 0
100 * 1 * (T - 20) + 200 * 1 * (T - 80) 0
100T - 2000 + 200T - 16000 = 0
300T - 18000 = 0
300T = 18000
T = 18000/300
T = 60ºC
1 1 1