Question

The boiling points of diethyl ether, acetone, and n-butyl alcohol are $35°\mathrm{C},56°\mathrm{C},$ and $118°\mathrm{C}$respectively. Which one of the following correctly represents their boiling points in the Kelvin scale?

• A. $306\mathrm{K},329\mathrm{K},391\mathrm{K}$
• B. $308\mathrm{K},329\mathrm{K},392\mathrm{K}$
• C. $308\mathrm{K},329\mathrm{K},391\mathrm{K}$
• D. $329\mathrm{K},392\mathrm{K},308\mathrm{K}$

Answer 1

The correct option is C

$308\mathrm{K},329\mathrm{K},391\mathrm{K}$

$\left(\mathrm{c}\right)308\mathrm{K},329\mathrm{K},391\mathrm{K}$

Explanation:

Kelvin's temperature is $0°\mathrm{C}+273$

1. The boiling point of diethyl ether is $35°\mathrm{C}=35+273=308\mathrm{K}$
2. The boiling point of acetone is $56°\mathrm{C}=56+273=329\mathrm{K}$
3. The boiling point of n-butyl alcohol is $118°\mathrm{C}=118+273=391\mathrm{K}$

Thus, 308K,329K, and 391K represent their boiling points on the Kelvin scale.

Final answer: $\left(\mathrm{c}\right)308\mathrm{K},329\mathrm{K},391\mathrm{K}$