A sealed rigid metal canister contains a constant volume of gas.
When the canister is placed in a freezer, the gas cools down and its pressure decreases.
Which row in the table correctly explains this decrease in pressure in terms of the behavior of the gas molecules?
| Number of gas molecules in canister | Average force of each collision with the wall | Number of collisions per second with the wall | |
|---|---|---|---|
| A | decreased | decreased | increased |
| B | unchanged | unchanged | decreased |
| C | unchanged | decreased | decreased |
| D | unchanged | decreased | increased |
Row A
Row B
Row C
Row D
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.