Mohon bantunnya nomer 48 dan 49

48.
delta H reaktan = delta H produk
-396 kj + -286 kj = - 814 kj + X
X = +132 kj


49.
1. Cari molalitas etilen glikol
delta T = kb x m
12 = 1.86 x m
m = 200 / 31
2. cari massa etilen glikol
m = massa etilen / Mr x 1000 / massa air
200 / 31 = massa etilen / 62 x 1000 / 20.000
massa etilen = 8000 gr = 8 kg