Solutions Question 256

Question: The boiling point elevation constant for benzene is 2.57∘C/m. The boiling point of benzene is 81∘C . Determine the boiling point of solution formed when 10 g of C4H12 is dissolved in 20 g benzene.

Options:

A) 71.46

B) 7.14

C) 85.76

D) 88.14

Show Answer

Answer:

Correct Answer: D

Solution:

ΔT=kb⋅m

=kb⋅WBMWB×1000WA

=2.57×10180×100020

=7.140C Now, ΔT=Tb−Tb0
⇒Tb=ΔTb+Tb0

=7.14+81=88.14∘C

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