tolong kasih tau caranya dong.., udah nyari2 gak ketemu, pliss kk

Q = mL + mcΔT
    = (0,5 kg)(340000 J/kg) + (0,5 kg)(4200 J/kg°C)(50°C)
    = 275000 J

Q1=m×l
=0,5×340.000
=170.000 J
Q2=m×c×∆T
=0,5×4.200×50
=2.100×50
=105.000 J
B-D=Q1+Q2=170.000+105.000=275.000 J

maaf kalo salah:)