Calculating Temperature in Kelvin from Celsius

The question asks us to convert a given temperature from the Celsius scale to the Kelvin scale. We are given the temperature measured by a room thermometer as 25°C.

To convert temperature from degrees Celsius (\(T_{^{\circ}C}\)) to Kelvin (\(T_{K}\)), we use a standard conversion formula:

The formula is:

\(T_{K} = T_{^{\circ}C} + 273.15\)

In many basic calculations, the value 273 is used for simplicity instead of 273.15. Let's use the value 273 as it is commonly used and aligns with the provided options.

Given temperature in Celsius, \(T_{^{\circ}C} = 25\text{ °C}\).

Now, we substitute the given value into the formula:

\(T_{K} = 25 + 273\)

Performing the addition:

\(T_{K} = 298\)

So, the temperature in Kelvin is 298 K.

Let's compare this result with the given options:

• Option 1: 200 K
• Option 2: 275 K
• Option 3: 298 K
• Option 4: 300 K

Our calculated temperature of 298 K matches Option 3 exactly. Therefore, the temperature of 25°C is equivalent to 298 K.

Understanding temperature scales like Celsius and Kelvin is fundamental in physics and chemistry. The Kelvin scale is the SI base unit of thermodynamic temperature, where 0 K (absolute zero) is the point at which particle motion theoretically stops.

In summary, converting 25°C to Kelvin gives 298 K using the simplified conversion factor.