Gas Laws

Question 1

As the temperature of a gas increases at constant pressure, the volume of the gas

Accepted Answer

increases

Question 2

At constant pressure the volume of a gas at 300K doubles. What is the new temp?

Accepted Answer

600K

Question 3

At what temp. would atoms of a He(g) have the greatest average kinetic energy?

Accepted Answer

37°C

Question 4

Which gas diffuses most rapidly at STP?

Accepted Answer

Ne

Question 5

At constant temp what volume will 80 L sample of gas at STP occupy when the pressure is halved?

Accepted Answer

160 L

Question 6

Standard temperature and a pressure of 0.5 atmosphere are equal to

Accepted Answer

0°C and 51.6 kPa

Question 7

A gas is held in a rigid cylinder. According to KMT, what occurs when the gas is heated?

Accepted Answer

The avg. velocity of the gas molecules increases.

Question 8

The temperature 30. K expressed in degrees Celsius is

Accepted Answer

–243ºC

Question 9

Which of the following gases behaves most like an ideal gas?

Accepted Answer

H2(g)

Question 10

What is the equivalent of 0 Kelvin on the Celsius scale?

Accepted Answer

-273 °C

Question 11

Under the same conditions of temp. and pressure, which gas will move the slowest?

Accepted Answer

Rn

Question 12

The kinetic molecular theory assumes that the particles of an ideal gas

Accepted Answer

are in random, constant, straight-line motion

Question 13

A gas has a volume of 2L at 1.0 atm. What is the pressure with a volume of 4L at constant temp?

Accepted Answer

0.5 atm

Question 14

At STP, what is the volume of 0.25 moles of nitrogen gas?

Accepted Answer

5.6 liters

Question 15

Which two samples of gas at STP contain the same total number of molecules?

Accepted Answer

2 L of H2 (g) and 2 L of Cl2 (g)

Question 16

Temperature is a measure of

Accepted Answer

average kinetic energy

Question 17

Equal volumes of SO2 (g) and O2 (g) at STP contain the same number of

Accepted Answer

molecules

Question 18

As the pressure of a sample of gas increases at constant temp, the mass of the sample

Accepted Answer

remains the same

Question 19

A real gas differs from an ideal gas because the molecules of a real gas have

Accepted Answer

some volume and some attraction for each other

Question 20

Under what conditions of temp. and pressure would He behave most like an ideal gas?

Accepted Answer

750 K and 20 kPa

Questions 20