system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If Hydrogen and Oxygen are both gases, then how come when combined they form a liquid?
gpt
Hydrogen and Oxygen arent both gasses, they are both elements.

Liquid Hydrogen and Liquid Oxygen both exist. When Oxygen and Hydrogen combine their boiling point is raised to above room temp making it a liquid at room temp instead of a gas.