At a constant temperature and pressure, a 2.0 L container holds 0.5 moles of Nitrogen gas (N2). If an additional 1.0 mole of Nitrogen is pumped into the container without changing the temperature or pressure, what will be the new volume of the container?
Correct answer: C. 6.0 L
- A. 3.0 L
- B. 4.0 L
- C. 6.0 L
- D. 8.0 L
Explanation
At constant temperature and pressure, volume is proportional to the number of moles (Avogadro's law). Adding 1.0 mole to 0.5 mole gives 1.5 moles, three times as much gas, so the volume rises from 2.0 L to 6.0 L. Answering 4.0 L comes from doubling instead of tripling.
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About Ideal Gas Equation
The ideal gas equation, PV = nRT, relates pressure, volume, amount and absolute temperature when gas particles are assumed to have negligible volume and no intermolecular forces. Applications include finding molar mass, density or an unknown gas variable, with careful use of Kelvin temperature and consistent units, and comparison with real-gas behaviour.
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