Question

Alumunium bermassa 2 kg dengan suhu 20°C menerima kalor sebesar 180 kilo joule. Jika kalor jenis alumunium= 900 J/kg°C, maka suhu akhir alumunium adalah...

Answer 1

180000 = 2.900.(T-20) 180000 = 1800(T-20) 100 = T - 20 T akhir = 120°

Answer 2

Dik :
m =2kg
t awal =20drjtC
Q =180 KJ = 180.000
C =900J/KgdrjtC
dit : t akhir ?
Q = m x C x delta t   
delta t = Q : m x C
         = 180.000 : 2 x 900
delta t =100
t akhir-t awal =100
a - 20 =100
a = 100 + 20
   = 120 drjtC

JADI SUHU AKHIR NYA 120 DERAJAT CELCIUS