Understanding Temperature Scales: Celsius and Kelvin

Temperature is a measure of how hot or cold something is. There are different scales used to measure temperature, with Celsius (°C) and Kelvin (K) being two common ones. The question asks us to find the equivalent temperature in Kelvin for 0 degrees Celsius.

Converting Temperature from Celsius to Kelvin

The Kelvin scale is an absolute thermodynamic temperature scale. It starts at absolute zero (0 K), which is the theoretical point where all atomic and molecular motion stops. The Celsius scale is a relative scale, where 0°C is defined as the freezing point of water and 100°C is the boiling point of water at standard atmospheric pressure.

To convert a temperature from the Celsius scale to the Kelvin scale, we use a simple formula:

$$ \text{Temperature in Kelvin (K)} = \text{Temperature in Celsius (}^\circ\text{C)} + 273.15 $$

However, in many practical applications and for typical multiple-choice questions like this, the value 273 is often used instead of 273.15 for simplicity. So the formula becomes:

$$ \text{Temperature in Kelvin (K)} \approx \text{Temperature in Celsius (}^\circ\text{C)} + 273 $$

Calculating 0 degrees Celsius in Kelvin

Let's apply the simplified conversion formula to find the equivalent temperature in Kelvin for 0 degrees Celsius:

Given temperature in Celsius = 0°C

Using the formula: $$ \text{Temperature in K} = \text{Temperature in }^\circ\text{C} + 273 $$

Substitute the given value:

$$ \text{Temperature in K} = 0 + 273 $$

$$ \text{Temperature in K} = 273 $$

So, 0 degrees Celsius is equal to 273 Kelvin.

Comparing with the Options

Let's look at the given options for the equivalent temperature:

• 0 K: This is absolute zero, a much lower temperature than 0°C.
• 273° C: This is a very high temperature, far above the boiling point of water.
• 273 K: Our calculation shows that 0°C is approximately equal to 273 K. This matches one of the options.
• 300 K: This temperature is higher than 273 K, which would correspond to a positive Celsius temperature (27°C approximately).

Based on the conversion formula, the temperature of 0 degrees Celsius corresponds to 273 Kelvin.