Unit 2: Gas Laws

Question 1

Gases are considered the _______ of matter.

Answer 1

Simplest state

Question 2

Gases are composed of molecules in _________.

Answer 2

Random order

Question 3

Molecules in gases _______________. They collide with walls of containers to ________________.

Answer 3

Collide elastically; exert pressure

Question 4

Increasing temperature, increases:

Answer 4

Kinetic energy applied to molecules giving them energy to move away from each other.

Question 5

What elements make up the atmosphere?

Answer 5

Nitrogen, oxygen, argon, CO2, etc.

Question 6

Convert the following:

0. 875 atm to mmHg
1. 0 mmHg to atm
2. 955 atm to kPa
3. 35 kPa to atm

Answer 6

665 mmHg

0. 98 atm
1. 8 kPa
2. 97 atm

Question 7

A gas occupies 1.56 L at 1.00 atm. What will be the volume of this gas if the pressure becomes 3.00 atm?

Answer 7

0.52L

Question 8

500.0 mL of a gas is collected at 745.0 mm Hg. What will the volume be at standard pressure?

Answer 8

490mL

Question 9

300 mL of O2 are collected at a pressure of 645 mm of mercury. What volume will this gas have at one atmosphere pressure?

Answer 9

250mL

Question 10

600.0 mL of air is at 20.0°C. What is the volume at 60.0°C?

Answer 10

681.9mL

Question 11

A gas occupies 1.00 L at standard temperature. What is the volume at 333.0 °C?

Answer 11

2.2L

Question 12

At 210.0 °C a gas has a volume of 8.00 L. What is the volume of this gas at -23.0 °C?

Answer 12

4.14L

Question 13

A gas syringe contains 56.05 milliliters of a gas at 315.1 K. Determine the volume that the gas will occupy if the temperature is increased to 380.5 K

Answer 13

67.68mL

Question 14

If 15.0 liters of neon at 25.0 °C is allowed to expand to 45.0 liters, what must the new temperature be to maintain constant pressure?

Answer 14

894K

Question 15

Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 20.0 °C to 30.0 °C.

Answer 15

1.03 atm

Question 16

A 30.0 L sample of nitrogen inside a rigid, metal container at 20.0 °C is placed inside an oven whose temperature is 50.0 °C. The pressure inside the container at 20.0 °C was at 3.00 atm. What is the pressure of the nitrogen after its temperature is increased?

Answer 16

3.3 atm

Question 17

A sample of gas at 3.00 x 10^3 mm Hg inside a steel tank is cooled from 500.0 °C to 0.00°C.
What is the final pressure of the gas in the steel tank?

Answer 17

1059.5 mmHg

Question 18

93.0 mL of O2 gas is collected over water at 0.930 atm and 10.0 °C. What would be the volume of this dry gas at standard conditions?

Answer 18

83.4 mL

Question 19

690.0 mL of oxygen are collected over water at 26.0 °C and a total pressure of 725.0 mm of mercury. What is the volume of dry oxygen at 52.0 °C and 800.0 mm pressure?

Answer 19

679.69 mL

Question 20

If a gas is heated from 298.0 K to 398.0 K and the pressure is increased from 2.230 x 103 mmHg to 4.560 x 10^3 mm Hg, what final volume would result if the volume is allowed to change from an initial volume of 60.0 liters?

Answer 20

39.2L

Question 21

A gas balloon has a volume of 106.0 liters when the temperature is 45.0 °C and the pressure is 740.0 mm of mercury. What will its volume be at 20.0 °C and 780 .0 mm of mercury pressure?

Answer 21

92.66L