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m1 (T - T1) = m2 (T2 - T)
2 (T - 20) = 6 (100 - T)
T - 20 = 300 - 3T
4T = 320
T = 80°C
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T1 = 20 °C
m2 = 6 kg
T2 = 100 °C
c = 4200 J/ Kg °C
m1.c.delta t = m2.c.delta t
2. 4200 *coret. ( Tc - 20 ) = 6. 4200 *coret. (100 - Tc)
2Tc . -40 = 600 - 6Tc
8Tc = 600+40
Tc = 640/8
Tc= 80 °C