Multiple Choice
On the periodic table, where can you find information about the phases (solid, liquid, gas) of elements such as water at room temperature?
2. Atoms & Elements
Periodic Table: Phases
Multiple Choice
At room temperature and standard atmospheric pressure, which phase(s) does H_2O exist in?
A
Solid only
B
Liquid and gas
C
Liquid only
D
Gas only
Verified step by step guidance1
Understand the question: It asks about the phase(s) in which H_2O (water) exists at room temperature and standard atmospheric pressure.
Recall the typical room temperature range, which is approximately 20-25°C, and standard atmospheric pressure, which is 1 atm.
Know the phase change points of water: the melting point (0°C) and the boiling point (100°C) at 1 atm pressure.
Since room temperature is above 0°C but below 100°C, water exists primarily as a liquid under these conditions.
Also consider that water can evaporate at room temperature, meaning some molecules enter the gas phase, so both liquid and gas phases coexist.
Related Videos
Related Practice
