Phase Change and Triple Point

At 0.10 atm, what phase(s) can exist?

• solid, liquid or gas

• liquid or gas

• solid only

• gas only

Tags

NGSS.MS-PS1-4

Water exists as a _____________ at 700 mmHg and 50 °C.

• solid

• liquid

• gas

• supercritical fluid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Calculate the amount of energy required to melt 25.0 grams of ice.

• 51.25 J

• 8,350 J

• 56,500 J

• 250,000 J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What change occurs from C to D?

• condensation

• vaporization

• melting

• sublimation

Tags

NGSS.MS-PS1-4

The melting point of the sample is

• -60 ºC

• -100 ºC

• 60 ºC

• 100 ºC

Tags

NGSS.MS-PS1-4

Which line segment represents the substance only in the solid state?

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which line segment represents the heat of fusion (ΔH_fus)?

Tags

NGSS.MS-PS1-4

What occurs when a solid changes to a liquid?

• mass changes

• energy is gained

• atoms move closer together

• energy is lost

Tags

NGSS.MS-PS1-4

The diagram represents a phase change for some copper. Which of the following phase changes are the copper atoms undergoing?

• gas to liquid

• liquid to gas

• solid to liquid

• liquid to solid

Tags

NGSS.MS-PS1-4

What is the triple point of water?

• 0°C and 1 atm

• 0.01°C and 0.006 atm

• 100°C and 1 atm

• -273.15°C and 0 atm

Tags

NGSS.MS-PS1-4