Jawabanmu

2014-01-11T11:57:04+07:00
M = 2kg
 t_{0} = 10^{o} C
Q = 336 000J
c = 4200
 t_{akhir} = ?

Q = m c Δt
336000 = 2. 4200 .( x^{o} - 10)
336000 = 84000 - 8400x
336000 + 84000 = 8400x
42000 =  8400x
x =[tex] \frac{420000}{8400} [/tex
x =50

2014-01-11T11:59:15+07:00
Q = 336 kj
   = 336.000 j
Q = m. c Δt
336.000 = 2 . 4200 . (x-10)
336.000 = 8400 (x-10)
336.000 = 8400x - 84.000

8400x = 336.000 + 84.000
8400 x = 420.000
        x = 420.000 / 8400
           = 50

jadi suhunya 50 derajad..
semoga membantu ^^