Energy and Phase Diagram

What is the phase of the substance at point A?

• Solid

• Liquid

• gas

• a mixture of liquid and gas

• a mixture of solid and liquid

Which of the following curves show evaporation and condensation occurring simultaneously?

I. Curve BD

II. Curve BF

III. Curve CB

• I only

• II only

• III only

• I and II

• II and III

What is the normal freezing point of the substance?

• 0.016 ⁰ C

• 0 ⁰ C

• 50 ⁰ C

• 100 ⁰ C

• 10 ⁰ C

What is the critical pressure of nitrogen?

• 1 atm

• 0.127 atm

• 20 atm

• 30 atm

• 33.5 atm

Tags

NGSS.HS-PS1-5

What is the pressure of nitrogen at the triple point?

• O atm

• 0.127 atm

• 1.00 atm

• 30 atm

• 33.5 atm

Tags

NGSS.HS-PS3-4

What change occurs from F to E?

• sublimation

• deposition

• melting

• condensation

• freezing

What will occur when the substance transitions from B to A? (Diagram A)

• condensation

• evaporation

• melting

• freezing

• sublimation

Tags

NGSS.HS-PS3-4

What will occur when the substance changes from 1 atm to 30 at a constant temperature of -15^oC? (Diagram A)

• condensation

• deposition

• melting

• sublimation

• evaporation

The temperature above which a substance cannot exist in the liquid state is _________.

• critical temperature

• critical pressure

• temperature

• pressure

• triple point

The temperature and pressure conditions at which the solid, liquid, and vapor of a substance can coexist at equilibrium is ______

• critical point

• triple point

• double point

• critical pressure

• critical temperature.