CHEM 200 Chapter Notes - Chapter 5: Gas Constant, Gas Laws, Torr

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limeimpala50

6 Nov 2016

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Document Summary

Chapter 5 gases and the kinetic-molecular theory. 5. 1 an overview of the physical states of matter. Most substances can exist as a solid, a liquid, or a gas under appropriate conditions of pressure and temperature. A gas adopts the container shape and fills it, because its particles are far apart and move randomly. A liquid adopts the container shape to the extent of its volume, because its particles are close together but free to move around each other. A solid has a fixed shape regardless of the container shape, because its particles are close together and held rigidly in place. Gas volume changes significantly with pressure: when a sample of gas is confined to a container of variable volume, increasing the force on the piston decreases the gas volume. Gas volume changes significantly with temperature: when a sample of gas is heated, it expands; when it is cooled, it shrinks.

Related Questions

1. Consider the following equation: 4C3H5(NO3)3(s) â 12CO2(g) + 10H2O(g) + 6 N2(g) + O2(g) MW C3H5(NO3)3(s) = 227.1 g/mol 205 g of C3H5(NO3)3 is reacted. Assume reaction goes to completion and all the product gases are collected at 195.0 Co. The pressure is 0.95 atm. What is the total volume of the gases?

2.Which of the following is a TRUE statement about gas?

Gas particles exert a pressure when they hit the sides of the container.

In general, doubling the pressure of a gas doubles its volume.

Because the molecules have small distances between them compared

to their size, they can't be compressed

Hold the volume constant and decrease temperature

3.One mole of oxygen gas is at one atmosphere of pressure and 10 ^oC. How can a scientist increase the pressure of the gas?

Decrease the temperature and hold volume constant

Increase the volume constant and decrease the temperature

Decrease the volume and increase the temperature

hold temperature constant and increase the volume

1.) A gas is found to have a density of 3.165 g/L at STP. What is its molar mass? Which of the following gases is it most likely to be?

Molar Mass: _________

a. NH3
b. O2
c. Cl2

d. SF6

2.) Calculate the pressure exerted by 5.05 moles of NCl3 gas in a 20.00-L container at -205Â°C for a real gas. (for xenon: a= 42.63 atmÂ·L2/mol2 and b= 0.2450 L/mol)

3.) Which of the following is NOT true in the kinetic molecular theory of ideal gases?

The size of the molecules are negligible compared to the volume of the container

The kinetic energy of a sample is proportional to the temperature of the gas.

Collisions are elastic (no friction occurs between the molecules when they collide)

The pressure of a sample is affected by which gases are present.

1.A gas sample has a volume of 235 $m L$ at 24 $^{\circ} C$ . What is its volume at 98 $^{\circ} C$ ?