Phase Diagrams

Which section represents the solid phase?

• A

• B

• C

• d

• e

Which section represents the liquid phase?

• A

• B

• C

• d

• e

Which section represents the gas phase?

• A

• B

• C

• d

• e

Tags

NGSS.MS-PS1-4

Which letter represents the triple point?

• A

• B

• C

• d

• e

Which of the following is true about the triple point?

• Gases and liquids are indistinguishable.

• A supercritical fluid exists.

• All states of matter co-exist.

• The point is always at standard pressure

Albuquerque is approximately 5,500 feet above sea level, which means atmospheric pressure is less than 1 atm. In Albuquerque, will water freeze at a lower or higher temperature than it does at sea level, where the pressure is 1 atmosphere?

• lower

• higher

Albuquerque is approximately 5,500 feet above sea level, which means atmospheric pressure is less than 1 atm. In Albuquerque, will water boil at a lower or higher temperature than it does at sea level, where the pressure is 1 atmosphere?

• lower

• higher

At 1 atmosphere and room temperature (25°C), would you expect solid carbon dioxide to melt to the liquid phase, or sublime to the gas phase?

• melt

• sublime

Some industrial processes require liquid carbon dioxide. Assuming we lived at sea level (1 atm), how could carbon dioxide be liquefied? Check all possibilities.

• Carbon dioxide is stored in tanks at a pressure of 50 atm and room temperature (25 °C).

• Carbon dioxide is stored in tanks at a pressure of 5.1 atm and room temperature (25°C).

• Carbon dioxide is stored in tanks at a pressure of 72.9 atm and a temperatures above 31 °C.

• Carbon dioxide is stored in tanks at a pressure of 15 atm and at a temperatures of -32 °C.

Tags

NGSS.HS-PS3-4

What are the two variables that control the state of matter for a material?

• density and boiling point

• solubility and mass

• pressure and temperature

• pressure and mass