tolong ya nomor 4 cara dan jwbannya

Q1 = m . c . ▲T
= 4kg . 4200 J/kgºC . (100ºC - 75ºC)
= 4kg . 4200 J/kgºC . 25ºC
= 420000 J
Q2 = m . u = 4kg . 2260000 J/kg
= 9040000 J
Qtotal = Q1 + Q2 = 420000J + 9040000J
= 9460000 J = 9460kJ
jawabannya yg a. 9460kJ

Qtotal = m.c.deltaT + m . U
Qtotal = 4 . 4200. (100-75) + 4. 2260000
Qtotal = 420.000 + 9.040.000
Qtotal = 9.460.000 joule
Qtotal = 9460 kJ
Jawaban A