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m1 = 230g = 0,23kg
m2 = 20 = 0,02kg
t1 = 90
t2 = 5
jawabn
m.c.Δt = m.c.Δt
230 .c ( 90 -Tc ) = 20 . c . ( Tc - 5 ) c dicoret
230 (90 - Tc = 20 ( Tc - 5)
2070 -23Tc = 2Tc - 10
2070 + 10 = 2 Tc+23Tc
2080 = 25Tc
2080/25 = Tc
83 C = Tc
jawabnya 83 drajat Celsius
mk = 230 gr......ms = 20 gr
tk = 90 ºC.........ts = 5 ºC
ck = cs =
t = ..... ?
.................Qk = Qs
......mk ck ∆tk = ms cs ∆ts
(230) c (90 - t) = (20) c (t - 5)........bagi 10c
.......23 (90 - t) = 2 (t - 5)
.......2070 - 23t = 2t - 10
...............2080 = 25t
.....................t = 2080/25 = 83,2 ºC..<-- jawaban
atau dapat juga dihitung seperti menghitung rata-rata tertimbang
(karena massanya tidak sama, yang panas banyak dan yang lebih dingin sedikit)
.....mk tk + ms ts
t = ----------------------
.........mk + ms
.....230×90 + 20×5
..= ----------------------
...........230 + 20
.....20700 + 100
..= ----------------------
...........250
.....20800
..= ----------
.......250
..= 83,2 ºC.
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