Consider the following substances and their normal boiling pts: C: 43.8 C D: 93.

Question

Consider the following substances and their normal boiling pts:

C: 43.8 C      D: 93.7C     M: 56.7 C    T:   83.5 C     R: 63.6 C

Q1. Which set below correctly lists some of these substancesin order of decreasing vapor pressure at 20 C?

a. C>R>D
b. D>T>R
c. R>M>D
d. C>D>M
e. D>R>M

Q2. Which set below correctly lists some of these liquids inorder of increasing intermolecular forces at 20 C?

a. C<R<D
b. D<T<R
c. R<T<C

can someone help me with this and explain why the correct one isthe answer.. thanks

Explanation / Answer

The lower the substance's normal boiling point, the higher thevapor pressure. Look to see which set list out decreasing vapor pressure (which isincreasing normal boiling point). A: C > R > D The higher the boiling point, the higher the intermolecularforces. A. C

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