Chapter 8 - Ideal Gases

Question 1

What are the different measurements of gases (related to 1atm)

Answer 1

1atm = 760mmHg = 760torr = 101.325 kPa

Question 2

What is temperature at STP? What is it at standard state?

Answer 2

STP: 0º (273K)

Standard state: 25º (298K)

Question 3

At stp how much volume does one mole of gas occupy?

Answer 3

22.4L

Question 4

How do you get a density out of a PV=nRT ?

Answer 4

p= m/V2

V2 = V1 (P1/P2)I(T2/P1)

Question 5

What is Avogadros principle?

Answer 5

All gases at constant temp and pressure occupy volumes that are directly proportional to the number of moles of gas present

**one mole of any gas will occupy 22.4 L at STP

n/V = k. K= constant

n1/V1 = n2/V2

Use when T and P are constant

Question 6

Boyle’s law

Answer 6

P1v1=p2v2

Question 7

Charles law

Answer 7

At constant p, V1/t1=V2/t2

Question 8

Dalton’s law

Answer 8

Combined gas law

Ptotal= p1 + p2 +…

(Total of partial pressures)

Question 9

How is a partial pressure measured?

Answer 9

Pa= XaPtotal

Xa = moles of gas A / total moles of gas

Question 10

Henrys law

Answer 10

[A] = Kh x PA.

[A]1 / P1 = A2/P2 = Kh

Question 11

This section was not studied beyond high yield

Answer 11

Go study more if you have time