If the volume of a gas is doubled while keeping the temperature constant, what will happen to the pressure (Pressure in gases (physics only))

The correct answer is It will halve.

Cause lens: Name the cause, then state the effect on particles, pressure, density, or energy. This question asks: If the volume of a gas is doubled while keeping the temperature constant, what will happen to the pressure (Pressure in gases (physics only)). The correct response is It will halve, 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) Explain why increasing the volume of a gas at constant temperature decreases its pressure. 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 532 is distinct because it uses this exact question context and the cause lens rather than a generic particle-model sentence.