Question 1

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

Accepted Answer

A barometer, invented by Italian physicist Torricelli

Question 2

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

Accepted Answer

$$0.064$$ atm

Question 3

Which of the following correctly describes Boyle's Law?

Accepted Answer

At constant temperature, the pressure and volume of a gas are inversely proportional: $$P V = k$$

Question 4

A balloon is squeezed, decreasing its volume. According to Boyle's Law, what happens to the pressure inside the balloon?

Accepted Answer

The pressure increases

Question 5

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

Accepted Answer

$$3.11 L$$

Question 6

Which law states that the volume of a gas is directly proportional to the number of moles at constant temperature and pressure?

Accepted Answer

Avogadro's Law: $$\frac{V}{n} = k$$

Question 7

If you have $$0.50$$ mol of $$O_2$$ gas at $$122 L$$, and all of it is converted to $$O_3 at $$the same temperature and pressure, what is the volume of $$O_3$$ produced?

Accepted Answer

$$81.3 L$$

Question 8

What is the value and units of the universal gas constant $$R$$ used in the ideal gas law?

Accepted Answer

$$0.0821 L$$·atm/(K·mol)

Question 9

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

Accepted Answer

$$0.497$$ mol

Question 10

Which of the following is NOT a standard unit of pressure?

Accepted Answer

Kelvin (K)

Question 11

At standard temperature and pressure (STP), what is the molar volume of a gas?

Accepted Answer

$$22.4 L$$

Question 12

Which statement best describes the relationship between temperature and kinetic energy of gas molecules?

Accepted Answer

As temperature increases, the average kinetic energy of gas molecules increases

Question 13

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

Accepted Answer

$$49 mL$$

Question 14

Which of the following is a correct rearrangement of the ideal gas law to solve for pressure?

Accepted Answer

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

Question 15

Which of the following statements about atmospheric pressure is TRUE?

Accepted Answer

Atmospheric pressure is the force exerted by gas molecules as they strike surfaces around them

Question 16

If a gas sample is heated at constant pressure, which law would you use to calculate the change in volume?

Accepted Answer

Charles' Law: $$\frac{V_1$}{T_1$} = \frac{V_2$}{T_2$}$$

Question 17

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

Accepted Answer

It supports life by allowing us to breathe

Question 18

Which of the following conversion factors is correct for pressure units?

Accepted Answer

$$1$$ atm $$= 760 mm Hg$$ $$= 101,325 Pa$$ $$= 14.7$$ psi

Question 19

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

Accepted Answer

$$23.8 L$$

Gas Laws and Atmospheric Pressure: General Chemistry Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards