Question

On converting $25°\mathrm{C}$, $38°\mathrm{C}$ and $66°\mathrm{C}$ to the kelvin scale, the correct sequence of temperatures will be:

• A. $298\mathrm{K},311\mathrm{K}\mathrm{and}339\mathrm{K}$
• B. $298\mathrm{K},300\mathrm{K}\mathrm{and}338\mathrm{K}$
• C. $273\mathrm{K},278\mathrm{K}\mathrm{and}543\mathrm{K}$
• D. $298\mathrm{K},310\mathrm{K}\mathrm{and}338\mathrm{K}$

Answer 1

The correct option is A

$298\mathrm{K},311\mathrm{K}\mathrm{and}339\mathrm{K}$

The correct option is (A): $298\mathrm{K},311\mathrm{K}\mathrm{and}339\mathrm{K}$

Explanation for the correct answer:

Kelvin temperature:

1. So basically, Kelvin temperature is the SI unit of the measurement of temperatures and is represented by the unit Kelvin $\text{'}\mathrm{K}\text{'}$.
2. And temperatures can be converted from Celsius to Kelvin just by the addition of 273 to the Celsius scale, and that is $\mathrm{K}=°\mathrm{C}+273$.
3. The given three temperatures on the Celsius scale are as: $25°\mathrm{C},38°\mathrm{C}\mathrm{and}66°\mathrm{C}$.
4. So, to convert all of them to the Kelvin scale , add 273 to the temperatures given.
5. $$\begin{gathered} 27°\mathrm{C}+273=298\mathrm{K} \\ 38°\mathrm{C}+273=311\mathrm{K} \\ 66°\mathrm{C}+273=339\mathrm{K} \end{gathered}$$

Therefore, the correct option is (A): $298\mathrm{K},311\mathrm{K}\mathrm{and}339\mathrm{K}$.