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, what will be the new pressure at constant temperature (Pressure in gases (physics only)) (Pressure in gases (physics only); definition focus: (Physics only) Calculate volume when pressure changes at constant temperature) (Pressure in gases (physics only); definition focus: (Physics only) Calculate volume when pressure changes at constant temperature)

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

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Particle model and pressure

Question

A. 200,000 Pa
B. This confuses pressure with a different particle-model idea in Particle model and pressure.
C. This gives a vague particle statement without answering the definition focus.
D. This reverses the cause and effect for Pressure in gases (physics only).

Answer

The correct answer is 200,000 Pa.

Explanation

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. 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, what will be the new pressure at constant temperature (Pressure in gases (physics only)) (Pressure in gases (physics only); definition focus: (Physics only) Calculate volume when pressure changes at constant temperature) (Pressure in gases (physics only); definition focus: (Physics only) Calculate volume when pressure changes at constant temperature). The correct response is 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) 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 560 is distinct because it uses this exact question context and the method 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.

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move

A gas has a pressure of 200,000 Pa and occupies a volume of 0.5 m³. What will be the volume of the gas if the pressure is increased to 400,000 Pa at constant temperature (Pressure in gases (physics only))