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

The correct answer is 200000 Pa.

Boundary lens: Keep this separate from nearby specification points that use similar words but test a different idea. This question asks: A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. If the volume is reduced to 1.0 m³ at constant temperature, what is the new pressure of the gas (Pressure in gases (physics only)). The correct response is 200000 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) Calculate pressure when volume 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 550 is distinct because it uses this exact question context and the boundary lens rather than a generic particle-model sentence.