Question 1

Which device is used to measure atmospheric pressure, and who invented it?

Accepted Answer

A barometer, invented by Evangelista Torricelli

Question 2

A pressure of 49 torr is equivalent to which of the following values in atmospheres?

Accepted Answer

$$0.064$$ atm

Question 3

According to Boyle’s Law, what happens to the volume of a gas if the pressure is doubled at constant temperature?

Accepted Answer

The volume is halved

Question 4

A sample of gas at $$15^	ext{∘}C$$ and $$1$$ atm has a volume of $$2.58 L. $$What volume will this gas occupy at $$38^	ext{∘}C$$ and $$1$$ atm?

Accepted Answer

$$2.98 L$$

Question 5

Which of the following statements best describes Avogadro’s Law?

Accepted Answer

At constant temperature and pressure, the volume of a gas is directly proportional to the number of moles

Question 6

A sample contains $$0.845$$ mol of $$N_2$$ gas at $$315 K $$and $$0.920$$ atm. What is the volume of the gas?

Accepted Answer

$$23.8 L$$

Question 7

Which of the following is NOT a unit of pressure?

Accepted Answer

mol

Question 8

A sample of methane gas with a volume of $$38 mL at$$ $$5^	ext{∘}C is $$heated to $$86^	ext{∘}C at $$constant pressure. What is its new volume?

Accepted Answer

$$49 mL$$

Question 9

Which of the following is the correct value for the universal gas constant $$R$$ when using liters, atmospheres, moles, and kelvin?

Accepted Answer

$$0.0821 L$$·atm/(mol·K)

Question 10

If you squeeze a balloon and decrease its volume, what happens to the pressure inside the balloon according to Boyle’s Law?

Accepted Answer

Pressure increases

Question 11

A sample of $$H_2$$ gas occupies $$8.56 L at$$ $$0^	ext{∘}C$$ and $$1.58$$ atm. How many moles of hydrogen are present?

Accepted Answer

$$0.499$$ mol

Question 12

Which of the following best describes the relationship between temperature and kinetic energy for gases?

Accepted Answer

Kinetic energy is directly proportional to temperature

Question 13

Which of the following is NOT a postulate of the Kinetic Molecular Theory (KMT)?

Accepted Answer

Gas particles exert attractive forces on each other

Question 14

What is the standard pressure at sea level in mm Hg?

Accepted Answer

760 mm Hg

Question 15

If the temperature of a gas is increased at constant pressure, what happens to its volume according to Charles’ Law?

Accepted Answer

Volume increases

Question 16

Which of the following is a correct rearrangement of the Ideal Gas Law to solve for pressure?

Accepted Answer

$$P = \frac{nRT}{V}$$

Question 17

A sample of $$O_2$$ gas contains $$0.50$$ mol at $$1$$ atm and $$25^	ext{∘}C. If $$all this $$O_2 is $$converted to $$O_3 at $$the same temperature and pressure, what would be the volume of the ozone?

Accepted Answer

$$12.2 L$$

Question 18

Which of the following is a real-world application of atmospheric pressure?

Accepted Answer

It supports life by maintaining oxygen levels

Question 19

Which of the following is NOT typically required when solving a PV=nRT problem?

Accepted Answer

Having both a 'situation 1' and 'situation 2'

Question 20

Which of the following is the correct conversion factor between atm and Pa?

Accepted Answer

$$1$$ atm $$= 101,325 Pa$$

Gases: Pressure, Gas Laws, and the Ideal Gas Law

Study Guide - Practice Questions

Study Guide - Flashcards