Gas Laws Postulates

What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 atm and the temperature is held constant?

• 100 atm

• 0.90 atm

• 1.0 atm

• 9.0 atm

What is the volume of 1 mole of gas at Standard Temperature and Pressure (STP)?

• 22.4 L

• 2.4 L

• .24 L

• .024 L

With pressure, volume, and temperature being known values, the ideal gas law can be used to —

• calculate the kinetic energy

• calculate the chemical formula

• calculate the number of moles

• calculate the density

Solid sodium carbonate, Na₂CO₃, reacts with sulfuric acid, H₂SO₄, to produce CO₂ gas according to the following equation:

Na₂CO_3(s) + H₂SO_4(aq) → CO_2(g) + H₂O_(l) + Na₂SO_4(aq)

During an experiment to produce carbon dioxide gas, a student recorded the following data:

Pressure CO₂ = 708.1 mm Hg

Volume CO₂ = 29.65 mL

Temperature CO₂= 25.5 °C

How many moles of CO₂ were produced?

• 1.13 × 10^-3 mol CO₂

• 8.57 × 10^-1 mol CO₂

• 8.46 × 10^-1 mol CO₂

• 8.88 × 10² mol CO₂

Tags

NGSS.HS-PS1-7

A sample of a gas in a rigid container at 30.0°C and 2.00 atm has its temperature increased to 40.0°C. What will be the new pressure?

• 1.50 atm

• 2.67 atm

• 2.07 atm

• 6.04 atm

Calculate the approximate volume of a 1.50 mol sample of gas at 15.0^oC and a pressure of 3.75 atm.

• 1.73 L

• 5.93 L

• 8.65 L

• 9.46 L

The volume of a gas is 50.0 mL at 20.0 K. What will be the new temperature if the gas is compressed to 10.0 mL under constant pressure?

• 100 K

• 10.0 K

• 4.00 K

• 5.00 K

The volume of a sample of oxygen is 200.0 mL when the pressure is 3.000 atm and the temperature is 37.0 ^oC. What is the new temperature if the volume increases to 400.0 mL and the pressure decreases to 2.000 atm?

• 49.33 ^oC

• 140.3 ^oC

• 209.8 oC

• 413.0 ^oC

Tags

NGSS.HS-PS3-1

A fixed quantity of gas is placed inside a container of fixed volume at a temperature of 27°C. The gas has a pressure, P.Which expression shows the pressure of the gas at 57°C?

• (27/57) P

• (57/ 27) P

• (300/330) P

• (330/300) P

If the temperature of a gas changes, but the number of moles and volume remain constant, which of the following values must also change?

• Density

• Pressure

• Number of atoms

• Mass

Tags

NGSS.HS-PS3-2