- At which temperature does the volume of a gas become zero according to Charles’s Law?
A) 0 K
B) 0 °C
C) -273 °C
D) 273 K
Answer: A) 0 K
Explanation: Theoretically, the volume of a gas approaches zero at absolute zero (0 K), where molecular motion ceases.
- Which of the following conditions would cause a real gas to deviate most from ideal gas behavior?
A) High temperature, low pressure
B) Low temperature, high pressure
C) High temperature, high volume
D) Low temperature, low pressure
Answer: B) Low temperature, high pressure
Explanation: Low temperatures and high pressures lead to significant intermolecular forces and finite particle volume, causing deviations from ideal behavior.
- In the Ideal Gas Equation, which variable does not appear when considering the amount of gas in moles?
A) Pressure
B) Volume
C) Temperature
D) The gas constant
Answer: D) The gas constant
Explanation: The gas constant R is a constant used in the equation and does not change based on the amount of gas.
- According to Avogadro’s Law, which of the following statements is true?
A) Equal volumes of gases contain equal masses.
B) Equal volumes of gases contain equal numbers of molecules at the same temperature and pressure.
C) The mass of gas is independent of volume.
D) Volume decreases with increasing temperature.
Answer: B) Equal volumes of gases contain equal numbers of molecules at the same temperature and pressure.
Explanation: Avogadro’s Law states that volume is directly proportional to the number of moles for gases under identical conditions.
- If the pressure of a gas is halved and its volume is doubled, what happens to its temperature?
A) It halves
B) It remains constant
C) It doubles
D) It quadruples
Answer: C) It doubles
- What does the term “elastic collision” mean in the context of gas particles?
A) Gas particles stick together after colliding.
B) Kinetic energy is conserved in the collision.
C) Some kinetic energy is lost during the collision.
D) Collisions do not occur between particles.
Answer: B) Kinetic energy is conserved in the collision.
Explanation: In elastic collisions, the total kinetic energy before and after the collision remains constant.
- If the volume of a gas is halved while the temperature is doubled, what happens to the pressure?
A) Pressure remains the same
B) Pressure halves
C) Pressure doubles
D) Pressure quadruples
Answer: D) Pressure quadruples
Explanation: According to the Ideal Gas Law, if the volume is halved and the temperature is doubled, the pressure increases by a factor of four.
- Which of the following factors does not affect the pressure of an ideal gas?
A) Number of moles
B) Volume
C) Temperature
D) Color of the gas
Answer: D) Color of the gas
Explanation: The color of the gas does not influence its physical properties such as pressure, volume, or temperature.
- What is the main reason real gases deviate from ideal behavior at high pressures?
A) Increased speed of particles
B) Increased volume of particles
C) Increased intermolecular attractions
D) Decreased kinetic energy
Answer: C) Increased intermolecular attractions
Explanation: At high pressures, gas particles are closer together, which enhances the effects of intermolecular attractions, leading to non-ideal behavior.
- When discussing real gases, which factor is often introduced to correct the Ideal Gas Equation?
A) Molar mass
B) Compressibility factor
C) Density
D) Average kinetic energy
Answer: B) Compressibility factor
Explanation: The compressibility factor (Z) accounts for deviations from ideal gas behavior and is used to modify the Ideal Gas Equation for real gases.
Leave a comment