# Ideal Gas Law and its Applications

The number of moles is a fourth variable that can be added to the three previous variables of temperature, pressure, and volume as a way to describe a gas sample. The Ideal Gas Law : PV = nRT describes the physical behavior of an ideal gas in terms of the pressure, volume, temperature, and number of moles of gas present. "R" is a constant that is dependent on the units used for pressure and will be provided. This quiz covers problems using the Ideal Gas Law. Select the best answer to the choices.

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What is the number of moles of gas contained in a 3.0L vessel at 300K with a pressure of 1.50 atm? PV = nRT R = .0821 L*atm/mol*K

0.18 mol

4.5 mol

2.3 mol

1.89 mol

If the pressure exerted by gas at 25C in a volume of .044L is 3.81 atm, how many moles of gas are present? R = .0821 L*atm/mol*K

8.89 mol

1.23 mol

0.069 mol

2.345 mol

Given: n = 2.49 mol V = 1.00 L P = 143 kPa R = 8.314 L*kPa/mol* K What is the temperature in degrees Celsius?

-273 C

-266 C

690 K

6.90 K

Given: P = .900 atm V = unknown n = .323 mol R = .0821 L*atm/mol*K T = 265 K Find the volume.

78.1L

0.781L

781L

7.81L

Determine the kelvin temperature requires for .0470 mol of gas to fill a balloon to 1.20L under .988 atm of pressure. R = .0821 L*atm/mol*K

190K

234K

307K

234C

A sample of an ideal gas is held at a constant temperature. If the pressure is decreased to 1/2 P, the volume will be:

Doubled

Decreased to 1/2V

Increased to 2V

Unchanged

A cylinder has 2 moles of ideal gas at a constant volume and pressure. Adding 2 more moles of gas makes the temperature_____.

Tripled

Halved

Doubled

Unchanged

P, V, M, T, and R are pressure, volume, molar mass, temperature and gas constant, then density of an ideal gas is:

PM/RT

PM/T

P/R

R/PM

Quiz/Test Summary
Title: Ideal Gas Law and its Applications
Questions: 8
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