What do you do to turn a liquid into gas?

Answer 1

You must get the liquid to its boiling point then as it boils it will start to evaporate turning it into a gas.
By agitating the molecules of the liquid (usually by heating it, but theoretically you could use sound or mechanical vibration) to the point where their kinetic energy is greater than the energy of the electromagnetic bonds holding the molecules in their liquid state.
liquid can be converted to gas by heating it to its boiling point
You can change it by heating it up for example when you heat up water. There is steam which is water in the state of a gas.
To change a liquid to a gas, just heat the liquid, or decrease the pressure around the liquid! Once you reach the liquid's boiling point (such as 212 degrees Fahrenheit (100 Celsius) for water) the liquid begins a phase change, and turns into a gas. The process by which a liquid becomes a gas is called vaporization.

Interestingly, if you decrease pressure around a liquid, then its boiling point decreases, while if you increase pressure, the boiling point increases. If you lower the pressure enough, water could boil at room temperature. This happens in space: if an astronaut jumped out into the void without a pressurized suit, he would feel the water on his eyes and tongue boiling away.

Answer 2

To turn a liquid into a gas, you need to increase its temperature until it reaches its boiling point, at which point enough thermal energy is added to overcome the intermolecular forces holding the liquid together, causing it to vaporize and turn into a gas.