tolong jawab 14-16 dikasi poin

14. Dik : m = 500 gram = 500/1000 = 0,5 kg
c = 4200 J/kg°C
ΔT = 80°C - 30°C = 50°C
Dit : Q
Jawab:
Q = m × c × ΔT
= 0,5 kg × 4200 J/kg°C × 50°C
= 105.000 J

15. Dik : Q = 21.000 Joule
c = 2100 J/kg°C
ΔT = 0 - (-2) = 0 + 2 = 2°C
Dit: m
Jawab :
m = Q / c × ΔT
m = 21000 J / 2100 J/kg° C × 2°C
m = 20 kg

16. Dik : m = 1 kg
ΔT = 30°C - 14°C = 16°C
Q = 7200 J
Dit : c
Jawab :
c = Q / m × ΔT
c = 7200 J / 1 kg × 16°C
c = 450 J/kg°C

17. Dik : Q = 8400 J
m = 500 gram = 500 / 1000 = 0,5 kg
c = 4200 J/kg°C
Dit : ΔT
Jawab :
ΔT = Q / m × c
ΔT = 8400 J / 0,5 kg × 4200 J/kg°C
= 4°C