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m. = 500 gram = 0.5 kg
c = 4200 J/kg
T1 = 20 derajat celcius
Dit : T2????
Q = m. c . ΔT
84000 J = 0.5 kg * 4.200 J/kg * ( - 20 derajat celcius)
84000 J = 2100 J ( - 20 derajat celcius)
84000 J = 2100 J. - 42000 J/C
84000 J + 42000 J/C = 2100 J .
126.000 J/C = 2100 J .
=
60 ° celcius =