Melting and Boiling Points of Hydrogen

Oct 13, 2025 by miodeya.com 105 views

**Understanding the Phase of Matter: A Discussion on Hydrogen's Melting and Boiling Points**

Hydrogen is the lightest and most abundant chemical element in the universe. It is a highly versatile element that exists in various forms, including solid, liquid, and gas. The phase of matter that an element exists in is determined by its temperature and pressure. In this article, we will discuss the melting and boiling points of hydrogen and determine the phase of matter it exists in at a temperature of -255°C.

Melting and Boiling Points of Hydrogen

Hydrogen has a melting point of -259.3°C and a boiling point of -252.9°C. These values are critical in determining the phase of matter that hydrogen exists in at different temperatures.

Phase of Matter at -255°C

To determine the phase of matter that hydrogen exists in at -255°C, we need to compare this temperature with the melting and boiling points of hydrogen.

Melting Point: The melting point of hydrogen is -259.3°C. Since -255°C is greater than the melting point, hydrogen is in a solid state at this temperature.
Boiling Point: The boiling point of hydrogen is -252.9°C. Since -255°C is less than the boiling point, hydrogen is not in a gas state at this temperature.

Q: What is the phase of matter that hydrogen exists in at -255°C? A: Hydrogen exists in a solid state at -255°C.

Q: Why is hydrogen in a solid state at -255°C? A: Hydrogen is in a solid state at -255°C because this temperature is greater than its melting point of -259.3°C.

Q: Is hydrogen in a gas state at -255°C? A: No, hydrogen is not in a gas state at -255°C because this temperature is less than its boiling point of -252.9°C.

Q: What are the melting and boiling points of hydrogen? A: The melting point of hydrogen is -259.3°C, and the boiling point of hydrogen is -252.9°C.

Q: How do the melting and boiling points of hydrogen determine its phase of matter? A: The melting and boiling points of hydrogen determine its phase of matter by indicating the temperature range at which it exists in a solid, liquid, or gas state.

In conclusion, hydrogen exists in a solid state at -255°C because this temperature is greater than its melting point of -259.3°C. The melting and boiling points of hydrogen are critical in determining its phase of matter, and understanding these values is essential in various scientific and industrial applications.

Q: What is the phase of matter that hydrogen exists in at -255°C? A: Hydrogen exists in a solid state at -255°C.
Q: Why is hydrogen in a solid state at -255°C? A: Hydrogen is in a solid state at -255°C because this temperature is greater than its melting point of -259.3°C.
Q: Is hydrogen in a gas state at -255°C? A: No, hydrogen is not in a gas state at -255°C because this temperature is less than its boiling point of -252.9°C.
Q: What are the melting and boiling points of hydrogen? A: The melting point of hydrogen is -259.3°C, and the boiling point of hydrogen is -252.9°C.
Q: How do the melting and boiling points of hydrogen determine its phase of matter? A: The melting and boiling points of hydrogen determine its phase of matter by indicating the temperature range at which it exists in a solid, liquid, or gas state.

National Institute of Standards and Technology. (2022). Hydrogen.
Royal Society of Chemistry. (2022). Hydrogen.
ScienceDirect. (2022). Hydrogen.

Hydrogen Properties: A comprehensive overview of the properties of hydrogen, including its melting and boiling points.
Phase Transitions: A discussion on the phase transitions that occur in hydrogen as it changes from a solid to a liquid to a gas.
Hydrogen Applications: A review of the various applications of hydrogen, including its use as a fuel and in the production of electricity.