Gases and Stuff

The Big 3

100

What is the name and formula of the "Big 3" gas equations

Boyles - P1V1 = P2V2

Charles - V1/T1 = V2/T2

Avogadros - V1/n1 = V2/n2

200

A gas occupies 12.3 liters at a pressure of 40.0 mmHg. What is the volume when the pressure is increased to 60.0 mmHg?

8.20 L

300

What is the proportionality of the 3 laws?

Boyles - inversely

Charles - directly

Avogadros - directly

400

A container with a volume of 25.47 L holds 1.050 mol of oxygen gas (O2) whose molar mass is 31.9988 g/mol. What is the volume if 7.210 g of oxygen gas is removed from the container, assuming the pressure and temperature remain constant?

20L

500

At one point in history people could measure temperature by looking at the volume of a sample of gas. Suppose a sample in a gas thermometer has a volume of 135mL at 11.0°C. Indicate what temperature would correspond to each of the following volumes: 113 mL, 142, mL, 155 mL , 127mL. (FIRST TO ANSWER CORRECTLY GETS THE CREDIT)

238 K or –35.3 °C; 299 K or 25.7 °C; 326 K or 53.1 °C; 267 K or -5.83 °C

Ideal Gas Law/Density

100

What is the formula for the ideal gas law

PV = nRT

200

What is the formula for density of a gas

d = PM/RT

300

The density of a gas is measured at 1.853 g / L at 745.5 mmHg and 23.8 °C. What is its molar mass?

46.01 g/mol

400

At what temperature will 0.654 moles of neon gas occupy 12.30 liters at 1.95 atmospheres?

447 K

500

Show how the ideal gas law and density question are related. 

rearrange the variables and cancel some units out and you can create the equations from one another

Formulas

100

What is the formula for Charles' Law

V1/T1 = V2/T2

200

What is the formula for pressure

P = F/A

300

What is the Effusion rate equation

EFR_A/EFR_B = √(MM_B/MM_A)

400

What is the Clausius-Clapeyron Equation?

Too hard to type in here so I will write it on the board

500

What is the equation for Kinetic Energy OR u_rms

KE_avg=3/2 k_B T or  KE_avg=1/2 mu_rms^2

 u_rms=√(3RT/M) or u_rms=√((3/2 k_B T)/m)

Vapors

100

What is vapor pressure?

The vapor pressure is the pressure exerted by a gas in equilibrium with its liquid phase at a given temperature

200

Vaporization is a(n) ______ process and condensation is a(n) _____ process

endothermic, exothermic

300

What three factors can affect the rate of vaporization?

Temperature, Surface Area, and IMF

400

What is the normal boiling point?

The temperature at which its equilibrium vapor pressure is equal to 1 atmosphere.

500

Carbon tetrachloride has a vapor pressure of 213 torr at 40.0 °C and 836 torr at 80.0 °C. What s the enthalpy of vaporization in kJ/mol?

31.4 kJ/mole

Random

100

One atm is equal to how much torr

1 atm = 760 torr

200

What does it mean to be volatile and what does it mean to be nonvolatile?

Volatile - evaporate easily

Nonvolatile - hard to evaporate

300

What are the conditions for STP

1 atm, 273^oK

400

If the density of hydrogen is 0.090 g/L and its rate of effusion is 5.93 times that of chlorine, what is the molar mass of chlorine?

70.89 g/mol

500

Draw an example phase diagram and label the triple and critical point

(Picture)