IB Physics Topic B1-3

Front

A fixed mass of an ideal gas is trapped in a cylinder of constant volume and its temperature is varied. Which graph shows the variation of the pressure of the gas with temperature in degrees Celsius?

Back

Front

Under what conditions of density and pressure is a real gas best described by the equation of state for an ideal gas?

Back

Low density and low pressure

Front

Some air is trapped inside a small balloon. The average kinetic energy of the air molecules in the balloon is increased. What remains the same?

Back

the mass of the air in the balloon

Front

Which of the following is not an assumption of the kinetic model of ideal gases?
- All particles in the gas have the same mass.
- All particles in the gas have the same speed.
- The duration of collisions between particles is very short.
- Collisions with the walls of the container are elastic.

Back

All particles in the gas have the same speed.

Front

A student measures the pressure and volume of an empty water bottle to be 1.4 atm and 2.3 L. She then decreases the pressure to 0.65 atm. What is the new volume?

Back

5.0 L

Front

A weather balloon has a volume of 105L at 0.970 atm when the temperature is 318K. What is the volume at 293K and 1.05 atm?

Back

89.4 L

Front

Each of the flasks shown above contain the same number of gas molecules. In which flask would the pressure be lowest?

Back

Flask 1

Front

What is the force acting on the area of the cylinder marked A due to the gas in a sealed cylinder of length l and cross-sectional area A containing N molecules of an ideal gas at kelvin temperature T?

Back

Front

A fixed mass of an ideal gas in a closed container with a movable piston initially occupies a volume V. The position of the piston is changed, so that the mean kinetic energy of the particles in the gas is doubled and the pressure remains constant. What is the new volume of the gas?

Back

Front

What is the definition of the mole?

Back

The amount of substance that contains as many elementary entities as the number of atoms in 12 g of carbon-12.