Exploring Phases and Phase Changes in Chemistry

What topics will be covered in the live streaming Regents review?

• Atomic structure, chemical bonding, and periodic table

• Phases of matter, phase changes, ideal gases, combined gas laws, and vapor pressure

• Organic chemistry, biochemistry, and environmental chemistry

• Nuclear chemistry, thermodynamics, and electrochemistry

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NGSS.MS-PS1-1

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Which of the following is NOT a classic phase of matter?

• Gas

• Aqueous

• Liquid

• Solid

What is the key characteristic of a gas particle diagram?

• Uniformly fills the container

• Fixed rigid geometric pattern

• Only fills the bottom of the container

• Definite shape and volume

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NGSS.MS-PS1-4

What is the term for the phase change from a solid directly to a gas?

• Sublimation

• Boiling

• Condensation

• Melting

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NGSS.MS-PS1-4

Which phase change is associated with the release of energy?

• Sublimation

• Condensation

• Boiling

• Melting

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NGSS.MS-PS1-4

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What happens to potential energy during a phase change on a flat line of the heating curve?

• It increases.

• It decreases.

• It fluctuates.

• It remains constant.

Which equation is used for calculating the heat of vaporization?

• Q = mH

• Q = mHV

• Q = mHF

• Q = mCΔT

What is the trigger word for using the heat of fusion equation?

• Condensation

• Melt

• Evaporate

• Boil

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following substances has the highest vapor pressure at 55 degrees Celsius?

• Propanone

• Water

• Ethanol

• Ethanoic acid

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NGSS.MS-PS1-4

Under which conditions does a gas behave most ideally?

• Low temperature and high pressure

• Low temperature and low pressure

• High temperature and low pressure

• High temperature and high pressure