Question 1

Refer to the first image. What is the primary cause of gas pressure in a closed container?

Accepted Answer

The collisions of gas molecules with the container walls.

Question 2

Based on the second image, what effect does increasing the concentration of gas molecules have on the rate of collisions and chemical reactions?

Accepted Answer

It increases the rate of collisions, leading to more reactions.

Question 3

Refer to the third image. Why does the jar with higher density of gas particles have higher pressure?

Accepted Answer

There are more collisions with the walls per unit time.

Question 4

The fourth image shows a mercury barometer. What does a height of 760 mm of mercury indicate?

Accepted Answer

The atmospheric pressure is 1 atm.

Question 5

The fifth image shows a manometer. What is the function of this device?

Accepted Answer

To measure the pressure of a gas in a closed container.

Question 6

The sixth image shows a blood pressure measurement. Which instrument is used for this purpose?

Accepted Answer

Sphygmomanometer

Question 7

Based on the table of common gases, which of the following gases is both colorless and has a pungent odor?

Accepted Answer

Ammonia (NH3)

Question 8

Refer to the J-tube image. What happens to the pressure of the trapped gas as more mercury is added?

Accepted Answer

The pressure increases.

Question 9

The graph of Boyle’s Law shows the relationship between pressure and volume. Which equation best describes this relationship?

Accepted Answer

$$P_1V_1 = P_2V_2$$

Question 10

In the molecular view of volume versus pressure, what happens to the volume when the pressure is doubled (at constant temperature and moles)?

Accepted Answer

The volume is halved.

Question 11

The graph of Charles’s Law shows the relationship between volume and temperature. What is the significance of the temperature where the volume extrapolates to zero?

Accepted Answer

It is absolute zero, or 0 K.

Question 12

In the molecular view of volume versus temperature, why does the balloon expand when moved from ice water to boiling water?

Accepted Answer

The kinetic energy of the gas molecules increases.

Question 13

The Avogadro’s Law graph shows a linear relationship between volume and number of moles. Which equation represents this law?

Accepted Answer

$$V_1$$/$$n_1$$ = $$V_2$$/$$n_2$$

Question 14

The image showing three gases (He, N2, CH4) at the same volume, pressure, and temperature demonstrates what property of gases at STP?

Accepted Answer

All gases have the same number of molecules in equal volumes at STP.

Question 15

The image with the chemical equation $$2H_2(g) + O_2$(g) \rightarrow 2H_2O(g)$$ illustrates which law?

Accepted Answer

Law of Combining Volumes

Study Guide: Gases and Their Properties (Chapter 6)

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