Which one of the following temperatures is equal to 5°C?
A) 278 K
B) 41 K
C) 465 K
D) 0 K

To convert Celsius to Kelvin, use the formula K = °C + 273.15 .
Substitute 5°C into the formula: K = 5 + 273.15 = 278.15 .
The closest option to 278.15 K is 278 K.
Therefore, 5°C is approximately equal to 278 K ​ .

Explanation

Understanding the Problem We are asked to convert 5 degrees Celsius to Kelvin and choose the correct option from the list.

Conversion Formula To convert Celsius to Kelvin, we use the formula: K = °C + 273.15 where K is the temperature in Kelvin and °C is the temperature in Celsius.

Calculation Substituting 5°C into the formula, we get: K = 5 + 273.15 = 278.15 Therefore, 5°C is equal to 278.15 K.

Finding the Answer Comparing our calculated value (278.15 K) with the given options, we see that option A (278 K) is the closest. Since the difference is only 0.15 K, we can consider it as the correct answer.


Examples
Converting temperatures between Celsius and Kelvin is essential in many scientific and engineering applications. For example, in thermodynamics, many calculations require the temperature to be in Kelvin because it is an absolute temperature scale. If you are designing a chemical process that needs to be run at 5°C, you would need to know the equivalent temperature in Kelvin (approximately 278 K) to properly set up and monitor the process.

Answered by GinnyAnswer | 2025-07-08

To convert 5°C to Kelvin, we use the formula K = ° C + 273.15 , which gives approximately 278.15 K. The closest answer among the options provided is A) 278 K. Thus, the correct answer is 278 K.
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Answered by Anonymous | 2025-07-16