Hitunglah kalor yang diperlukan untuk menaikan suhu es dari -10°c sampai 45°c,jika Mes =Mair =200 gram,Lf es =80 kal/g,Ces =0,5 kal/g°c dan Cair =1 kal/g°c.
damianamukti
Q1 = m es × c es × ΔT = 200g × 0,5kal/g C × 10 C = 1000kal Q2 = m × L = 200g × 80kal/g =16.000kal Q3 = m air × c air × ΔT = 200g × 1kal/g C × 45C = 9000kal Qtotal = 1000kal + 16000kal + 9000kal =26.000kal = 26kkal
= 200g × 0,5kal/g C × 10 C
= 1000kal
Q2 = m × L
= 200g × 80kal/g
=16.000kal
Q3 = m air × c air × ΔT
= 200g × 1kal/g C × 45C
= 9000kal
Qtotal = 1000kal + 16000kal + 9000kal
=26.000kal
= 26kkal