To convert Celsius (°C) to Kelvin (K), you need to add 273.15 to the Celsius temperature. Here's the formula:
Kelvin = Celsius + 273.15
Let's apply this formula to convert 25°C to Kelvin:
Kelvin = 25°C + 273.15 Kelvin = 298.15 K
Therefore, 25°C is equivalent to 298.15 Kelvin.