phase diagrams

When you cross the line on a phase diagram and go from a Iiquid to a gas, what has occurred?

• melting

• condensation

• vaporization

• sublimation

When a line is drawn across pressure at 1atm in a general phase diagram, what can be located?

• Supercritical fluid

• Critical temperature and critical pressure

• Normal melting and boiling points

• triple and critical point

What is the melting point of this substance at 1 ATM of pressure?

• 40

• 60

• 100

• 110

What is the boiling point of this substance at 1 ATM of pressure?

• 40

• 60

• 100

• 110

What would the state of this substance be at 0.5 ATM of pressure at a 100 degrees Celsius?

• Solid

• Liquid

• Gas

• supercritical fluid

What would the state of this substance be at 1 ATM of pressure at a 80 degrees Celsius?

• Solid

• Liquid

• Gas

• supercritical fluid

Based on what you have learned... Is this substance likely water?

• Yes

• No

What letter on the diagram represents the triple point?

• A

• B

• C

• D

For water, how are pressure and boiling point related?

• the greater the pressure, the lower the boiling point

• The lower the pressure, the higher the boiling point

• The greater the pressure, the higher the boiling point

• All answers are incorrect.

What is happening at the triple point on a phase diagram?

• Solid, liquid and gas exist at equilibrium

• Only gas and liquid exist at equilibrium

• Only solid and liquid exist equilibrium

• Only solid and gas exist at equilibrium