Tolong bantu no 2 dan 3 pakai cara nya

Dik:c / kalor jenis es = 0,55 kal/g derajat c
m = 50 g
t1 = -45 derajat C
t2 = -5 derajat C
dit:Q...?
jawab:
Q = m.c.ΔT
Q = 50 gram . 0.55 kal / gram . (-5 -(-45)
Q = 50 . 0,55 . 40
Q = 1,100 Joule
Q = 1,1 k Joule/kkal


3. Dik=t₁=100°C
m₂= 300 gr= 0,3 kg
t₂=0°C
ta= 40°C
Dit= m₁...?
Jwb=
Q₁=Q₂
m₁.c.Δt=m₂.c.Δt
m₁.(t₁-ta)=m₂.(ta-t₂)
m₁(100-40)=0,3(40-0)
m₁.60=0,3.40
60.m₁= 12
m₁= 0,2 kg
m₁= 200 gram (e)

semoga mmbntu:)