Question detail

A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. If the volume is decreased to 1.0 m³ while keeping the temperature constant, what will be the new pressure of the gas (Pressure in gases (physics only))

Try the question, check the answer, then read the explanation to understand the curriculum point.

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Question

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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 volume is decreased to 1.0 m³ while keeping the temperature constant, what will be the new pressure of the gas (Pressure in gases (physics only))

Answer

The new pressure of the gas will be 200,000 Pa.

Explanation

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. If the volume is decreased to 1.0 m³ while keeping the temperature constant, what will be the new pressure of the gas (Pressure in gases (physics only)). The correct response is The new pressure of the gas will be 200,000 Pa., 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) Interpret pressure-volume data for a fixed mass of gas 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 571 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.

Common mistake

Misinterpreting Pressure-Volume Relationship

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

Remember that for a fixed mass of gas at constant temperature, increasing the volume decreases the pressure, as described by the equation P x V = constant.

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