tolong donk apa jawabanya ?

Dik: m= 1 Kg
c. es = 2100 J/Kg°C
L = 336000 J/Kg
c. air = 4200 J/Kg°C
t. PQ = -5 °C
Dit: Q dari P-Q-R

Jawab:
P-Q-R = PQ + QR
PQ= m. c. Δt
= 1. 2100. 5
= 10500 Joule

QR= m. L
= 1. 336000
= 336000 Joule

PQR= 10500+ 336000
= 346500 Joule