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180 - 30 = 150
Q = 0,5 x 150 x 400
= 30000 J
m = 500 g --> 0,5 kg
c = 400 J/kg°C
ΔΤ = 180-30 = 150°C
dit :
Q ?
dij :
Q = mcΔΤ
= 0,5 x 400 x 150
= 30.000 Joule
atau
= 30 kJ