Question

Air sebanyak 2gr suhu 100⁰C dicampur dengan air sebanyak 3gram suhu 40⁰C.jika kalor jenis air 1kal/gr⁰C,hitunglah suhu akhir campurannya !

Answer 1

Q lepas = Q terima
m₁ c ΔT = m₂ c ΔT  
   m₁.ΔT = m₂.ΔT
2 (100-Tc) = 3 (Tc-40)
200-2Tc = 3Tc - 120
     320 = 5Tc
       Tc = 320/5
            = 32.10 / 5
            = 64 C
    
     

Answer 2

        Q lepas = Q terima
  m₁ × c × ΔT = m₂ × c × ΔT  
        m₁ × ΔT = m₂ × ΔT
2 ( 100 - Tc ) = 3 ( Tc - 40 )
      200 - 2Tc = 3Tc - 120
               320 = 5Tc
                 Tc = 64°C