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2.1.3a The absolute scale of temperature

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Question 5

A sealed, rigid canister contains a constant volume of gas. When the canister is placed in a freezer, the gas cools down and its pressure decreases. What explains this decrease in pressure in terms of the motion of gas molecules?

A

Number of gas molecules in canister: decreased; Average force exerted during a collision with the canister wall: decreased; Number of collisions per second with the canister wall: increased

B

Number of gas molecules in canister: decreased; Average force exerted during a collision with the canister wall: unchanged; Number of collisions per second with the canister wall: increased

C

Number of gas molecules in canister: unchanged; Average force exerted during a collision with the canister wall: decreased; Number of collisions per second with the canister wall: decreased

D

Number of gas molecules in canister: unchanged; Average force exerted during a collision with the canister wall: unchanged; Number of collisions per second with the canister wall: decreased

Markscheme

2.1.3a The absolute scale of temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.1.3a The absolute scale of temperature

126 exam-style questions on CIE IGCSE Physics 2.1.3a The absolute scale of temperature. Each one has a worked solution and a mark scheme showing where the marks go.

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