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Massa = massa jenis x volume
=200g
Perubahan suhu = 34-26 = 8 C
Kalor jenis = 4,18j/grC
Q=m c delta T
=200 x 4,18 x 8
=6688 J
reaksi penetralan :
HCl + NaOH -> NaCl + H2O
I I
100mlx1M/1000 = 0,1 mol
Jadi Q sebesar 6688 J untuk 0,1 mol
Untuk 1 mol = 1/0,1 x 6688 = 66880 J
entalpi = berbanding terbalik dengan Q
entalpi = -66880 J = -66,88kJ