Jawabanmu

2014-04-14T14:38:14+07:00
Q= m.c.Δt
M= 2 kg
C= 4200 J/ kg k
Δt= 50 derajatC= 323 K
= 2 x 4200 x 323
= 2.713.200 J

2014-04-14T14:40:03+07:00
Dik c air =  4200 J/(kg K)
      m = 
2 kg
      T1 = 50 C
      T0 = 0 C
Dit Q . . .?
jawab.
rumus Q = m c 
ΔT

Q = 2 . 4200 . (50 - 0)
    = 420 000 kalori