Question 1: Define molar gas volume and state its standard value at room temperature and pressure.

Answer: Molar gas volume is the volume occupied by one mole of a gas at standard temperature and pressure, which is approximately 22.4 liters.

Question 2: Explain why gases expand to occupy larger volumes compared to solids or liquids.

Answer: Gases expand to occupy larger volumes because their particles are far apart and move freely, allowing them to fill the available space.

Question 1: Calculate the volume in liters occupied by 3 moles of nitrogen gas (N2) at room temperature and pressure.

Answer: Volume = moles × molar gas volume = 3 mol × 22.4 L/mol = 67.2 liters

Question 2: If 50 liters of oxygen gas (O2) are collected, how many moles of oxygen are present under the same conditions?

Answer: Moles = volume / molar gas volume = 50 L / 22.4 L/mol ≈ 2.23 mol

Question 1: Describe a simple experimental setup to measure the molar gas volume of hydrogen gas produced from the reaction of zinc with hydrochloric acid.

Answer: Set up a delivery tube connected to a conical flask with zinc and hydrochloric acid, collect the gas in a graduated cylinder inverted in water, ensure safety precautions like goggles and gloves are followed, and measure the volume of hydrogen produced over a specific period.

Question 2: Identify two variables that must be controlled during the experiment and explain why.

Answer: Temperature and pressure must be controlled because they affect gas volume; keeping them constant ensures accurate measurements of molar gas volume.

Question 1: A student collected 24 liters of carbon dioxide (CO2) gas at room temperature and pressure. How many moles of CO2 are present?

Answer: Moles = volume / molar gas volume = 24 L / 22.4 L/mol ≈ 1.07 mol

Question 2: If the same student wanted to produce 2 moles of CO2, what volume should they collect under the same conditions?

Answer: Volume = moles × molar gas volume = 2 mol × 22.4 L/mol = 44.8 liters

Question 1: Explain how the concept of molar gas volume is used in the industry to produce large quantities of gases like oxygen or nitrogen.

Answer: Industries rely on the molar gas volume to calculate the amount of gas produced or required for processes such as oxygen production for healthcare or nitrogen for food packaging. Knowing the molar volume helps in designing efficient storage and transportation systems, ensuring safety and cost-effectiveness.

Question 2: A new technology involves using molar gas volume to analyze environmental gases. Describe a potential application of this technology.

Answer: This technology could be used to analyze greenhouse gas emissions by measuring the volume of gases like CO2 or methane in the atmosphere. Accurate volume measurements allow scientists to estimate emission levels, track pollution sources, and develop strategies to reduce environmental impact.