Question

Aluminium bermassa 2kg dengan suhu 20C menerima kalor sebesar 180kJ. Jika kalor jenis aluminium =900 J/kg C, Suhu akhir aluminium adalah........C
BERSERTA CARANYA ^_^

Answer 1

M = 2
t1 = 20
Q = 180kj = 180000 j
c = 900
t2 = ?

Q = m.c.Δt
180000 = 2.900.(t2-t1)
180000 : 2.900 = t2-20
100 = t2-20
100+20 = t2
t2 = 120C

Answer 2

Q = m. c. perubahan suhu
180000 J= 2x900x (y-20)
180000 J= 1800 (y-20)
(y-20)= 180000 /1800
y-20= 100
y= 100+20
y= 120 C