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= 2. 4,2 x 10³ . ( 100 - 30)
= 8,4 x 10³ . 70
= 5,88 x 10^5
= 588000 J
Rumusnya
Q = m c Δt
Q = kalor
m = massa
c = massa jenis
Δt = selisih suhu
Q
= 2 x 4,2 x 103 x 70
= 60564 Joule
tapi menurut saya itu bukan 103 tapi yang 10³ .. betul tidak ?
jika benar 10³ maka jawabannya 588000 J