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Diketahui :
m = 4 kg
To = 20 C
Tt = 90 C
Q = 128.800 J
Ditanyakan : c ?
Dijawab :
c = Q/(mx(Tt-To)
= 128.800/(4x(90-20))
= 128.800/280
= 460 J/KgC
Nomor 4 :
T1 = -10 C
T2 = 0 C
Q = 31.500 J
c es = 2100 J/KgC
Ditanyakan : m ?
Dijawab :
m = Q/(cx(T2-T1))
= 31.500/(2100x(0-(-10))
= 31.500/21.000
= 1,5 kg