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4200 = 0.25 ces (-2--10)
16800 = ces (8)
ces = 2100
Q=4200 J
ΔT=(-2-(-10))
=8°C
dit: c=
jb: Q=m.c.ΔT
4200= 0,25 . c . 8
4200=2 c
c= 4200/2
=2100 J/kg°C