Understanding Methane State at -170 Degrees Celsius

Methane is a crucial component in the study of atmospheric gases and energy resources. At various temperatures and pressures, methane exhibits different physical states, which are important for industrial and scientific applications. In this article, we will explore the state of methane at -170 degrees Celsius and the role of pressure in determining its phase.

Boiling Point of Methane

Methane, chemically represented as CH?, has a boiling point of approximately -161.5 degrees Celsius at standard atmospheric pressure. This means that at this temperature, methane transitions from a liquid to a gaseous state under normal conditions. However, at -170 degrees Celsius, the temperature is significantly lower than the methane boiling point. Let's delve into the state of methane at this temperature.

Rewriting the Initial Statement

At -170 degrees Celsius, methane is in a gaseous state.

Methane has a boiling point of about -161.5 degrees Celsius at standard atmospheric pressure. Therefore, at -170 degrees Celsius, methane would be below its boiling point and therefore remain in a gaseous state unless it is under high pressure, which could potentially liquefy it.

Pressure and Methane's State

The state of methane is highly dependent on the pressure it is subjected to. It's important to note that pressure plays a critical role in determining whether methane is a liquid or a gas.

Melting and Boiling Points of Methane at 1 Atmosphere

At one atmosphere of pressure, methane has a melting point of -182 degrees Celsius and a boiling point of -161.5 degrees Celsius.

Temperature and Pressure Dependence

Given that -165 degrees Celsius is close to but slightly higher than the boiling point of methane at one atmosphere, we can infer that at -165 degrees Celsius and 1 atmosphere, methane would indeed be in a liquid state.

For a more detailed and precise understanding of the phase changes in methane, it is recommended to consult a Pressure-Temperature (PT) diagram. Such diagrams are invaluable tools for predicting the states of gases under different conditions. Additionally, companies like Air Liquide provide extensive technical data and commercial bibliography that can offer advanced insights into methane's behavior.

Resources and Further Study

To gain a deeper understanding of the physical properties of methane under various conditions, you can explore the following resources:

Chemistry and Biochemistry: A Comprehensive Review

This document provides a detailed look at how the phases of methane change with temperature and pressure, offering a comprehensive view of its behavior in different scenarios.

In conclusion, the state of methane at -170 degrees Celsius is gaseous, as the temperature is below its boiling point at standard pressure. Understanding the pressure effects on methane is vital for various applications, from industrial processes to scientific research.

For more information on methane's physical properties and phase transitions, refer to the Pressure/Temperature diagram and the extensive technical data available from reputable sources.