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

Answer 1

The correct option is A

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

Explanation of correct answer:

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

Kelvin is the SI Unit of measurement of temperatures and is represented by the Unit Kelvin 'K'.

Temperatures can be converted from Celsius to Kelvin by adding 273 to the Celsius Scale, that is $\mathrm{K}=°\mathrm{C}+273$

The given 3 temperatures are on the Celsius Scale.

$25°\mathrm{C},38°\mathrm{C}$, and $66°\mathrm{C}$

To convert all of them to the Kelvin Scale, add 273 to the given temperatures.

$25°\mathrm{C}+273=298\mathrm{K}$

$38°\mathrm{C}+273=311\mathrm{K}$

$66°\mathrm{C}+273=339\mathrm{K}$

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