Hydrogen DOES have a liquid state as does oxygen. The two liquids are combined to power our space exploration vehicles (rocket science).
Carbon dioxide does not have a liquid phase. It goes right from a gaseous state to a solid at very low temperatures. AKA "Dry ice"
The change from liquid or solid into vapor. Note that there are technically still hydrogen bonds while in the gas phase, but they're not as important (unless at a high pressure and/or low volume).
Gas. Unquestionably. Consider the alternative: Liquid? Solid? Maybe plasma? Liquid and solid hydrogen only produced in near the absolute temperature. Plasma on the other hand requires enormous temperature and pressure (Sun).
Hydrogen is a gas at room temperature.
Gas
The opposite phase change is condensation. Evaporation is the change in phase from liquid to gas. Condensation is the change in phase from gas to liquid.
yes it is transition from the liquid phase to gas phase
The change from liquid or solid into vapor. Note that there are technically still hydrogen bonds while in the gas phase, but they're not as important (unless at a high pressure and/or low volume).
The melting phase changes are Solid~Liquid~Gas and the freezing phase changes are Gas~Liquid~Solid
Gas. Unquestionably. Consider the alternative: Liquid? Solid? Maybe plasma? Liquid and solid hydrogen only produced in near the absolute temperature. Plasma on the other hand requires enormous temperature and pressure (Sun).
gas
Phase changes requiring the addition of heat energy are the phase changes from solid to liquid, liquid to gas, and solid to gas. These phase changes are termed melting (solid to liquid), evaporation (liquid to gas), and sublimation (solid to gas).
Hydrogen is a gas. The only method that can cause this gas to become liquid is pressure.
Hydrogen is a gas at room temperature.
Gas
The phase change for liquid to gas is vaporization, which includes evaporation and boiling.Evaporation - The change of liquid molecules on the surface of a liquid to a gas.Boiling - The change of phase at or above the boiling point of the liquid, which takes place at nucleation sites within the liquid.
Vaporization of an element or compound is a phase transition from the liquid or solid phase to gas phase
The opposite phase change is condensation. Evaporation is the change in phase from liquid to gas. Condensation is the change in phase from gas to liquid.