3rd 9 Weeks Exam Review 23-24

According to the kinetic theory of gases, which assumption is correct?

• Energy may be transferred between colliding particles.

• The volume of gas particles prevents random motion.

• Gas particles travel in curved paths.

• Gas particles strongly attract each other.

The chemical equation below represents the formation of hydrochloric acid. H₂(g) + Cl₂(g) → 2 HCl(g) If 22.4 Liters of Cl₂ gas reacts with H₂ gas, what volume of HCl gas will be produced?

• 11.2 L

• 22.4 L

• 44.8 L

• 89.6 L

Complete the statement below about gas volume and the ideal gas laws. Move the answers to the correct boxes. The relationship between temperature and gas volume is known as ____________ . This law states that the volume of a mass of gas at a constant ____________ varies directly with the temperature. (2 answers)

• Charles' law

• Avogadro's law

• Boyle's law

• pressure

• molarity

Which of these graphs best represents the relationship between the volume and temperature of a gas when the pressure and number of moles of the gas are kept constant? Select ONE correct answer.

• Graph showing a direct relationship between volume and temperature

• Graph showing an inverse relationship between volume and temperature

• Graph showing a direct relationship with a curve between volume and temperature

• Graph showing an inverse relationship with a curve between volume and temperature

Mark the answer to the correct box. Each box requires only ONE answer. At a constant temperature, if the pressure of a gas increases, the volume will _______.

• decrease

• remain the same

• increase

Which quantity represents 1.00 mole at STP?

• 16.0 grams of H2O(l)

• 22.4 liters of H2O(l)

• 16.0 grams of O2(g)

• 22.4 liters of O2(g)

What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 atm and the temperature is held constant?

• 100 atm

• 0.90 atm

• 1.0 atm

• 9.0 atm

If 5.00 L of a gas is known to contain 0.965 mol. If the amount of gas is increased to 1.80 mol, what new volume will result (at an unchanged temperature and pressure)?

• 9.33 L

• 8.69 L

• 3.68 L

• 1.80 L

Observe the balloons A and B above. Both balloons have a temperature of 25.0°C, contain 0.50 moles of gas sealed by the knot at the bottom, and have a volume of 2.2 L. If balloon A is placed in a freezer with a temperature of -5.50°C, which of the following statements regarding the volumes of the balloons is accurate?

• The balloons will remain unchanged and have equal volume at 2.2 L.

• Balloon A will be smaller due to fewer moles of gas in the balloon.

• Balloon A will be larger due to lower pressure inside the freezer.

• Balloon A will be smaller due to the gas particles moving slower.

According to the graph above, what is the relationship between volume and the number of moles of a gas if the pressure remains constant? Which gas law does this relationship refer to (Boyle's, Charles', or Avogadro's law)? (2 answers)

• Inverse

• Dalton's law
• Boyle's law
• Avogadro's Law

• Direct