# Absolute Zero

Gases | The Ideal Gas Law.

Tip: This isn't the place to ask a question because the teacher can't reply.

## Key Questions

• Absolute zero is the temperature at which enthalpy and entropy of ideal gas reaches zero.

In Kelvin scale this temperature is taken as $0$ Kelvin.

It is the point at which particle motion stops for monatomic ideal gases. However, molecules will still vibrate.

#### Explanation:

All temperatures above absolute zero will cause particles in any material to move/vibrate slightly, as temperature gives particles Kinetic energy, according to the equipartition theorem for monatomic ideal gases:

${K}_{a v g} = \frac{3}{2} {k}_{B} T$

${k}_{B}$ = Boltzmann's constant = $1.38065 \times {10}^{-} 23 J / K$
$T$ = absolute temperature (Kelvin)

At absolute zero, $T = \text{0 K}$, so there is effectively no average kinetic energy of the molecules. (although the state of absolute zero is more of a concept as it has not yet been achieved). This means that particle motion ceases in monatomic gases.

Absolute zero is also the foundation for the Kelvin scale, as $\text{0 K" = -273.15^@ "C}$ is the coldest that you can ever hope to get.

• This key question hasn't been answered yet.

## Questions

• · 3 weeks ago
• 1 month ago
• · 1 month ago
• 2 months ago
• · 2 months ago
• · 2 months ago
• · 1 year ago
• · 1 year ago
• · 2 years ago
• · 2 years ago
• 3 years ago
• · 3 years ago
• · 3 years ago
• 3 years ago
• 3 years ago
• · 3 years ago
• · 3 years ago
• · 3 years ago
• · 3 years ago

## Videos on topic View all (1)

• No other videos available at this time.