chất khí

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The Vietnamese word "chất khí" is a noun that means "gas" in English. It refers to a state of matter where substances have no fixed shape or volume and can expand to fill the space around them.

Usage Instructions:

• "Chất khí" is used to describe substances that exist in the gaseous state, such as oxygen, carbon dioxide, and nitrogen.
• You can use it in scientific contexts or everyday conversations when discussing air, breathing, or chemical reactions.

Example:

• "Không khí chủ yếu là chất khí nitrogen và oxy." (Air is mainly composed of nitrogen and oxygen gas.)

Advanced Usage:

In more advanced contexts, "chất khí" can be discussed in terms of its properties, like density, pressure, and temperature. It can also be used in scientific discussions about gas laws, such as Boyle's Law or Charles's Law.

Word Variants:

• "Chất" means "substance" or "material."
• "Khí" means "air" or "gas."
• Combined, they specifically refer to gases, but "khí" can also refer to air in a more general sense.

Different Meanings:

While "chất khí" primarily means "gas," the word "khí" can also refer to "air" or "breath" depending on the context.

Synonyms:

• "Hơi" (vapor or steam) – while not exactly the same as "chất khí," it refers to a gaseous state that is often produced by boiling.
• "Khí trời" (atmosphere) – refers to the air surrounding the Earth, emphasizing its gaseous nature.

Academic

noun

1. Gas