14.3. Ideal Gases http://www.ck12.org
Lesson Review Questions
Reviewing Concepts
- Explain why it is impossible for a truly ideal gas to exist.
- Under what conditions of temperature and pressure are gases most ideal? Explain.
Problems
- What is the volume of 1.50 moles of an ideal gas at 94.5 kPa and 320. K?
- At what Celsius temperature does 10.5 g of methane gas (CH 4 ) under a pressure of 1.77 atm occupy 35.6 L?
Assume the methane is ideal. - 22.0 grams of helium occupies 8.80 L at a temperature of 67.0°C. Calculate the pressure in kPa.
- A 3.40 L sample of nitrogen gas (N 2 ) is at 920. mmHg pressure and a temperature of 400 K. Calculate the
mass of the sample. - A student obtains a canister filled with one of the noble gases, but the label is illegible. She determines that
the mass of the gas is 382.7 grams. The canister’s volume is 35.00 L and the pressure and temperature are
320. kPa and 22°C. Find the molar mass. Which noble gas is it? - What is the density of xenon gas under the following conditions?
a. at STP
b. at 43.2 mmHg and−89°C- At what Celsius temperature does F 2 gas have a density of 1.15 g/L when the pressure is 1.07 atm?
- Which gas below would you expect to be the most ideal? The least ideal? Explain your answers.
a. H 2 at 200 K
b. H 2 at 400 K
c. NH 3 at 200 K
d. NH 3 at 400 K- The reaction of carbon with sulfur dioxide produces carbon disulfide and carbon monoxide. 5C(s)+2SO 2 (g)→
CS 2 (l)+4CO(g)
a. What volume of SO 2 at 138 kPa and 224°C is required to react completely with 325 g of carbon?
b. A certain reaction produces 42.2 L of CO at 812 mmHg and 500 K. What mass of CS 2 was also produced
in the reaction?
c. 21.98 g of carbon is reacted with 19.40 L of SO 2 at 0.893 atm and 315°C. Determine the limiting reactant.
What mass of CS 2 will be produced?Further Reading / Supplemental Links