How do you convert Celsius to Kelvin?

• A. K = C + 273
• B. K = C - 273
• C. K = C x 273
• D. K = 273 - C

Answer: (A)

To convert Celsius to Kelvin, the formula is K = C + 273. This equation is based on the understanding that the Kelvin scale is an absolute temperature scale, where zero Kelvin (0 K) is the absolute zero point, signifying that there is no thermal energy. The Celsius scale is relative to the freezing and boiling points of water, where 0 degrees Celsius (0 °C) corresponds to the freezing point of water and 100 degrees Celsius (100 °C) corresponds to its boiling point at standard atmospheric pressure.

The conversion from Celsius to Kelvin involves adding 273.15 to the Celsius temperature to account for this difference between the two scales. In practical applications, rounding down to 273 is often acceptable for simplicity, especially in preliminary calculations or context where precise differences are not critical.

Using this conversion is crucial in many scientific and engineering contexts, as many calculations and systems (like gas laws and thermodynamics) require temperatures to be in Kelvin to maintain consistency and accuracy.