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Q ab = 2 * 2100 * 10 = 42.000 J
Q bc = m * L
Q bc = 2 * 336.000
Q bc = 672.000 J
Q ab + Q bc = 42.000 + 672.000 = 714.000 J
Jawaban C
= 2kg . 2100J/kg°C . (0°C-(-10°C))
= 42.000 J
Q B-C = m . U
= 2kg . 336.000J/kg
= 672.000J
Q total = Q A-B + Q B-C
= 42000 J + 672000 J
= 714000J
⇒C. 714.000J