Kelvin

The Kelvin scale is a temperature scale used in the physical sciences. It is based on the absolute zero point, which is the lowest possible temperature. On the Kelvin scale, the temperature of a substance is directly proportional to the average kinetic energy of its particles.

Key Concepts:

• Absolute Zero: The theoretical lowest temperature, at which the motion of particles ceases. It is equivalent to 0 K on the Kelvin scale.
• Conversion: To convert Celsius to Kelvin, add 273.15 to the Celsius temperature. The formula is: K = °C + 273.15.
• Triple Point of Water: The temperature at which water can coexist as a solid, liquid, and gas. It is precisely 273.16 K, and is used to define the Kelvin scale.

Study Guide:

When studying the Kelvin scale, it is important to understand the concept of absolute zero and the relationship between Kelvin and Celsius. Here are some key points to focus on:

1. Define absolute zero and its significance in the Kelvin scale.
2. Understand the relationship between Celsius and Kelvin temperatures.
3. Learn about the triple point of water and its role in defining the Kelvin scale.
4. Practice converting temperatures between Celsius and Kelvin using the conversion formula.

Understanding the Kelvin scale is essential for various scientific applications, including chemistry, physics, and Earth science.

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