tolong dijawab ya pake cara

Qa-b= m×c×*segitiga t massa diubah dulu 500 gram= (5×10^-1)
=(5×10^-1)×2100×(-10-0)
=5×210×10
= 10500 joule
Qb-c= m×lebur es
=(5×10^-1)×(336000)
= 5×33600
= 168000 joule
Jadi, Q.total= Qa-b+Qb-c
= 10500+168000
=178500 joule di ubah 178500:1000= 178,5 kJ/kilo Joule
Maaf kalo salah