Answered

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Question 1 of 25

Room temperature is usually considered to be 25°C. What is that in kelvins?

A. -248 K
B. 298 K
C. 25 K
D. -25 K

Sagot :

GinnyAnswer
To convert a temperature from Celsius to Kelvin, you can use the following formula:

[tex]\[ K = °C + 273.15 \][/tex]

Here's the step-by-step process:

1. Identify the given temperature in Celsius:
[tex]\[ °C = 25 \][/tex]

2. Use the formula to convert to Kelvin:
[tex]\[ K = 25 + 273.15 \][/tex]

3. Perform the addition:
[tex]\[ K = 298.15 \][/tex]

4. Since Kelvin is typically presented as an integer in everyday contexts (especially in multiple choice questions), you would round 298.15 to the nearest whole number:
[tex]\[ 298 \][/tex]

Based on these steps, the room temperature of 25°C is approximately [tex]\(298 \, \text{K}\)[/tex].

Therefore, the correct answer is:

B. 298 K
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