If I have a substance in the vapor phase at approximately 25 degrees Celsius, how can I change the phase to liquid without changing the temperature?

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Which statement can best be concluded from the ideal gas law?