Chp 5 Gases

Question 1

What is Avogodros law?

Answer 1

V1/V2 = N1/N2

Constant temp and pressure

Question 2

What is Boyles law?

Answer 2

PV = PV

Question 3

What is Charles law?

Answer 3

V1/V2 = T1/T2

Constant n P

Question 4

What is constant R?

Answer 4

R = .08206 (L•atm/mol•K)

Question 5

What’re is ideal gas equation?

Answer 5

PV = nRT

Question 6

What is Daltons Law? (Mixing Gases)

Answer 6

P1or2 = nRT/V
P1 + P2 = Ptot
X = moles/totMoles

P1 = X1•Ptot
P2 = X2•Ptot

Question 7

What’re the goals in stoichiometry?

Answer 7

Get to moles

Always balance equation

Question 8

What is the kinetic molecular theory of gases?

Answer 8

• Far distance from each other, negligible volume
• perfectly elastic collisions
• neither attractive/repulsive force on one another
• same temp- Use KE Eq

Question 9

Formula for molecular speed?

Answer 9

Sqrt(3•R•T/M)

R = 8.314
M- molar mass kg per one mole

Question 10

What happens when a gas has 1 mole?

Answer 10

It’s an ideal gas.

PV/RT = 1 = n

Question 11

What is pressure?

Answer 11

Force/Area

1 atm = 760mmHg (torr) =101.3 kPa

Question 12

Molecular speed:
Lower temps
Higher temps

Answer 12

Lower-uniform speeds

Bigger- bigger STDEV

Question 13

How to calculate mole fraction in substance?

Answer 13

Convert to moles. Divide individial by total

Question 14

Explain the concept of the J tube?

Answer 14

Closed tube- at least 1.5 m. Add .76 IF 1 atm

Open- subtract .76 from closed

Question 15

What’re the conditions of STP?

Answer 15

273 K
1 aTm
1 mole
22.4 L