Ideal Gas

A solid cylinder of density 8.0 × 10³ kg m⁻³ has height h = 25 cm. What is the pressure exerted by the cylinder on the horizontal surface on which it rests?

• 1.0 × 10⁴ Pa

• 2.0 × 10⁴ Pa

• 3.0 × 10⁴ Pa

• 4.0 × 10⁴ Pa

Two solid cylinders made of the same material rest on a horizontal surface. Which cylinder exerts the greater pressure?

• The taller cylinder

• The shorter cylinder

• The heavier cylinder

• The lighter cylinder

The pressure of a fixed quantity of gas is 2.0 atm and its volume is 0.90 dm³ . The pressure is increased to 6.0 atm at constant temperature. Determine the new volume.

• 0.10 dm³

• 0.20 dm³

• 0.30 dm³

• 0.40 dm³

A gas expands at constant pressure from an original volume of 2.0 m³ at 22 °C to a volume of 4.0 m³ . Calculate the new temperature.

• 590 K

• 327 C

• 598 K

• 307 C

The graph shows the variation with Kelvin temperature of the pressure of equal quantities of two gases at different volume. Which gas has the smaller volume?

• Red Line

• Blue Line

• Eventually the same

• Can't be determined

A gas in a container of fixed volume is heated from a temperature of 37 °C and pressure 3.0 × 10⁵ Pa to a temperature of 87 °C. Calculate the new pressure.

• 3.2 × 10⁵ Pa

• 3.3 × 10⁵ Pa

• 3.4 × 10⁵ Pa

• 3.5 × 10⁵ Pa

Estimate how many molecules there are in a gas of temperature 320 K, volume 0.025 m³ and pressure 4.8 × 10⁵ Pa.

• 2.5 × 10²⁴

• 2.6 × 10²⁴

• 2.7 × 10²⁴

• 2.8 × 10²⁴

A container of hydrogen of volume 0.10 m³ and temperature 25 °C contains 3.2 × 10²³ molecules. Calculate the pressure in the container.

• 1.1 × 10⁴ Pa

• 1.3 × 10⁴ Pa

• 1.4 × 10⁴ Pa

• 1.5 × 10⁴ Pa

A fixed quantity of gas of volume 3.0 × 10⁻³ m3 , pressure 3.0 × 10⁵ Pa and temperature 300 K expands to a volume of 4.0 × 10⁻³ m3 and a pressure of 6.0 × 10⁵ Pa. Calculate the new temperature of the gas.

• 800 K

• 800 C

• 477 C

• 800 F

Figure shows two isothermal curves for equal quantities of two ideal gases. Which gas is at the higher temperature?

• Blue Line

• Red Line

• Eventually The Same

• Can't be determined