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Verified answer
Dik =m = 2kg
T1 = 80°c
T2 = 20°c
C = 400 J/kg°c
Qawal = M.C.T1
= 2 x 400 x 80
= 6400 J
kalor yang di lepas adalah
Q = M.C.∆T(T2-T1)
= 2 x 400 x (20-80)
= 2 x 400 x (-60)
= -4800 J
Verified answer
Diketahui: m=2kgc.=400j /kg
∆t=T2-T1
=20°C-80° C =-60°C
ditanya: Q ?
dijawab:Q= m.c.∆t
=2x400x(-60)
=-48000 j =48 kj