Jawabanmu

2014-03-26T06:52:05+07:00
84 kJ = 84000 J
500 gr = 0,5 kg
20 C = 293 K

Q = m c ΔT
84000 = 0,5 x 4200 x (T-293)
84000 = 2100 (T-293)
84000 = 2100T - 615300
2100T = 699300
T = 333 K = 60 C.
2014-03-26T07:31:24+07:00
84 KJ = 84000 J
500 gr = 0,5 KG
20 C = 293 K

Q = m c at
84000 = 0,5 x 4200 x ( T - 293 )
84000 = 2100  ( T - 293 )
84000 = 2100 T - 615300
2100 T = 699300
T = 60 C