Chapter 15a Measuring Gases

The enhanced greenhouse effect is caused by a build up of greenhouse gases such as CO₂, CH₄ and NOx (nitrogen oxides) in the atmosphere. The global warming potential (GWP) for these gases is in which order?

• CO₂ < CH₄ < NOx

• NOx < CO₂ < CH₄

• CH₄ < CO₂ < NOx

• CH₄ < CO₂ < NOx

Water in the atmosphere is a greenhouse gas.

• True

• False

Which of the following statements relating to the kinetic molecular theory of gases is INCORRECT.

1. 1. Gas particles move at random and collide elastically.

2. 2. The volume of gases is mostly empty space.

3. 3. The forces of attraction and repulsion between gas particles are practically zero.

4. 4. The speed with which gas particles move remains constant as temperatures change.

• 1

• 2

• 3

• 4

25 °C is equivalent to

• 298 K

• 25 K

• -248 K

• 125 K

Standard Laboratory Conditions (SLC) are

• 25 °C & 100 kPa

• 0 °C & 100 kPa

• 25 °C & 10 kPa

• 0 °C & 10 kPa

The same volume of nitrogen and oxygen gases at the same temperature and pressure will have the same mole of gas.

• True

• False

The of 1.5 mol of O₂ gas is

• 37.2 L

• 12.4 L

• 0.060 L

• 24.8 L

20 mL of N₂ gas is mixed with 50 mL of O₂ gas to produce NO₂ gas. The total gas volume at the end of the experiment would be:

N₂(g) + 2O₂(g) → 2NO₂(g)

• 50 mL

• 70 mL

• 40 mL

• 30 mL

0.2500 mol of nitrogen is placed in a flask of volume 5.000 L at a temperature of 5.000°C. What is the pressure in the flask?

• 2.078 kPa

• 115.5 kPa

• 2,888 kPa

• 8.657 Pa

• 0 g

• 16.8 g

• 4.19 g

• 0.955 g