Convert 45°C to kelvin

Analysis

The question asks for the conversion of a temperature value from the Celsius scale (°C) to the Kelvin scale (K). This is a fundamental concept in thermodynamics often tested in JAMB Physics.

Concept

The relationship between the Celsius scale and the Kelvin scale is defined by the formula:

In most JAMB and secondary school examinations, the value 273 is used as the standard constant for this conversion. Therefore, the simplified formula is:

Solution

1. Identify the given value: $\theta = 45°C$
2. Apply the formula: $T(K) = 45 + 273$
3. Perform the addition: $45 + 273 = 318$

So, 45°C is equivalent to 318K.

Conclusion

Comparing our result to the provided options: A. 318K B. 250K C. 184K D. 120K

The correct option is A.

Exam Tip

Always remember: "Celsius to Kelvin, add 273; Kelvin to Celsius, subtract 273." A common mistake students make is subtracting when they should be adding. Since the Kelvin scale starts at absolute zero (-273°C), the Kelvin value will almost always be higher than the Celsius value for temperatures above absolute zero.