Phase Diagrams & Pressure 2

What state of matter is X?

• solid 
• liquid
• gas
• supercritical fluid

What state of matter is Y?

• solid 
• liquid
• gas
• supercritical fluid

What state of matter is Z?

• solid 
• liquid
• gas
• supercritical fluid

What is point A?

• triple point
• critical point
• equilibrium point
• normal melting point

What is point B?

• triple point
• critical point
• equilibrium point
• normal melting point

What change occurs from F to E?

• sublimation
• deposition
• melting
• condensation

What change occurs from E to C?

• sublimation
• freezing
• melting
• boiling

What change occurs from C to D?

• condensation
• vaporization
• melting
• sublimation

The pressure is increased on a sample of water at 0 °C from 0 mmHg to 800 mmHg.  In order, what changes occur?

• deposition, melting
• sublimation, melting
• condensation, freezing
• deposition, freezing

What is true regarding CO₂ for temperatures above 31 °C?

• It can never be liquified.
• It decomposes.
• It has a high pressure.
• It is a plasma.