Jawabanmu

2014-04-06T18:40:01+07:00
Q = m.c.ΔT
Q = 2. 4200. (50 - 0)
Q = 420.000 J
Q = 420 kJ

2014-04-06T19:56:09+07:00
Q = m c ĀT = 2 * 4200 *(323 -0) = 2713200 J , semoga dapat membantu....^^