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T1=90
m2=2kg
T2=60
C air=4200
dit. T campuran?
m.c.ΔT=m.c.ΔT
1 x 4200 (90-T)=2x 4200 (T-60)
4200 (90-T)=8400 (T-60)
60 (90-T)=120 (T-60)
5400-60T=120T-7200
5400+7200=120T+60T
12600=180T
T=12600/180
T=70°c
m1 . c1 . Delta T1 = m2 . c2 . Delta T2
1 kg . 4184 J/kg (massa jenis air) . (90-tc) = 2 kg . 4184 J/kg . (Tc-60)
90 - 1tc = 120 - 2tc
3tc = 30
tc = 10