Answers AL-Physical Science A- TAPIntroduction to Matter

Behavior of Gases Answers

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Keisha finds instructions for a demonstration on gas laws. 1. Place a small marshmallow in a large plastic syringe.2. Cap the syringe tightly.3. Pull the plunger back to double the volume of gas in the syringe.

This is a demonstration of Charles’s law. As the volume increases, the temperature decreases, and the marshmallow will freeze.

This is a demonstration of Charles’s law. As the volume increases, the temperature increases, and the marshmallow will melt.

This is a demonstration of Boyle’s law. As the volume increases, the pressure decreases, and the marshmallow will grow larger.

This is a demonstration of Boyle’s law. As the volume increases, the pressure increases, and the marshmallow will shrink.

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A gas is cooled from 365 K to 285 K while its volume changes from 12.8 L to 9.9 L. The initial pressure of the gas is 1.9 atm.

1.3 atm

2.9 atm

1.9 atm

9.9 atm

Brenda fills in the table below to organize information about the gas laws. In which numbered cells should she place volume?

2, 3, and 6

1, 4, and 6

1, 3, and 5

2, 4, and 5

At a constant temperature, the volume of a gas doubles when the pressure is reduced to half of its original value. This is a statement of which gas law?

Boyle’s law

Charles’s law

Gay-Lussac’s law

combined gas law

A gas has an initial volume of 168 cm3 at a temperature of 255 K and a pressure of 1.6 atm. The pressure of the gas decreases to 1.3 atm, and the temperature of the gas increases to 285 K.

122 cm3

153 cm3

185 cm3

231 cm3

Why were the British surprised by Washington’s attack on Trenton?

The British thought Washington had lost troops because enlistments expired.

The British were celebrating Christmas and were unprepared for battle.

The British had chased Washington to Princeton.

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Behavior of Gases Answers

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