Sebanyak 0,300 g urea, co(nh2)2 dilarutkan ke dalam 10 g air untunglah titik didih

wt = 0,3 gr (Mr = 60)
wp = 10 gr
Kb = 0,52°C
Tb = ........................?

∆Tb = mol × 1000/p × Kb
= 0,3/60 × 1000/10 × 0,52
= 0,26°C

Tb = Tb° + ΔTb = 100 + 0,26 = 100,26°C