What is the specific gravity of natural gas, and does it have a liquid phase?

What is the specific gravity of natural gas, and does it have a liquid phase?

• A. Vapor .6 and there is no liquid
• B. Vapor .6 and there is a liquid
• C. Vapor .7 and there is no liquid
• D. Vapor .8 and there is no liquid

Answer: (A)

Specific gravity is the density of a gas compared to the density of air at the same conditions. Natural gas has a specific gravity of about 0.6, so it is lighter than air and will tend to rise and disperse when released. The term “vapor” here means it is in the gaseous state under normal conditions, not a liquid. Natural gas does not have a liquid phase in ordinary use; a liquid form (LNG) only occurs under cryogenic temperatures or with special processing, not in routine handling or transport.

Specific gravity is the density of a gas compared to the density of air at the same conditions. Natural gas has a specific gravity of about 0.6, so it is lighter than air and will tend to rise and disperse when released. The term “vapor” here means it is in the gaseous state under normal conditions, not a liquid. Natural gas does not have a liquid phase in ordinary use; a liquid form (LNG) only occurs under cryogenic temperatures or with special processing, not in routine handling or transport.