Kelvin - Explanation and Study Guide

What is Kelvin?

Kelvin is a unit of temperature in the International System of Units (SI). It is used in scientific and engineering calculations where precise temperature measurements are required.

Conversion from Celsius to Kelvin

The Kelvin scale starts at absolute zero, which is equivalent to -273.15 degrees Celsius. The conversion from Celsius to Kelvin is done using the following formula:

Kelvin = Celsius + 273.15

Conversion from Fahrenheit to Kelvin

To convert temperature from Fahrenheit to Kelvin, you first need to convert it to Celsius and then to Kelvin using the above formula.

Applications of Kelvin

Kelvin is used in scientific research, thermodynamics, and in fields such as physics, chemistry, and engineering. It is also the primary temperature scale used in most of the world.

Practice Questions

1. Convert 25°C to Kelvin.
2. What is the temperature in Kelvin if it is 68°F?
3. At what temperature does water freeze in Kelvin?

Answers

1. 25°C = 25 + 273.15 = 298.15 Kelvin
2. 68°F = (68 - 32) * 5/9 = 20°C, then 20°C + 273.15 = 293.15 Kelvin
3. Water freezes at 0°C, so 0°C + 273.15 = 273.15 Kelvin