Question detail

A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. If the pressure is increased to 200,000 Pa while keeping the temperature constant, what will be the new volume of the gas (Pressure in gases (physics only))

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At a glance

Question

Type

exam_style

Style

Topic

Particle model and pressure

Question

A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. If the pressure is increased to 200,000 Pa while keeping the temperature constant, what will be the new volume of the gas (Pressure in gases (physics only))

Answer

1.0 m³

Explanation

Comparison lens: State both sides of the comparison so the contrast is explicit rather than implied. This question asks: A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. If the pressure is increased to 200,000 Pa while keeping the temperature constant, what will be the new volume of the gas (Pressure in gases (physics only)). The correct response is 1.0 m³, because density links mass and volume, so the answer must preserve which quantity is being calculated. In Pressure in gases (physics only), the marking point should connect directly to (Physics only) Calculate volume when pressure changes at constant temperature. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Particle model and pressure, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 557 is distinct because it uses this exact question context and the comparison lens rather than a generic particle-model sentence.

Common mistake

Confusing Pressure and Volume Relationships

Students often confuse the relationship between pressure and volume, thinking that increasing pressure always leads to an increase in volume.

Remember that for a fixed mass of gas at constant temperature, increasing the pressure actually decreases the volume, as described by Boyle's Law.

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A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. | AQA Physics | ExamCompanion