Question

A sample of water is heated from room temperature to just below the boiling point. The overall change in temperature is 72°C. Express this temperature change in kelvins. (a) 345 K (b) 72K (c) 0K (d) 201 K (e)273K

Answer 1

Answer : The correct option is, (a) 345 K

Explanation :

The conversion used for the temperature from degree Celsius to Kelvin is:

$K=273.15+^oC$

where,

$K$ = temperature in Kelvin

$^oC$ = temperature in centigrade

As we are given the temperature in degree Celsius is, 72

Now we have to determine the temperature in Kelvin.

$K=273.15+^oC$

$K=273.15+(72^oC)$

$K=345.15\approx 345$

Therefore, the temperature in Kelvin is, 345 K

Answer 2

Answer: Option (a) is the correct answer.

Explanation:

It is known that when temperature is given in degree celsius and we want it to convert into kelvin then we need to add 273 into the given degree celsius.

For example, given temperature is $72^{o}C$.

Now, to convert it into degree celsius we need to add 273 into it as follows.

   Temperature in Kelvin = (72 + 273) K

                                         = 345 K

Thus, we can conclude that given temperature in Kelvin is 345 K.