Question

Consider a binary mixture of benzene and toluene that forms an ideal solution at 313 K. At this temperature, the vapor pressure above pure benzene is 180 torr and the vapor pressure above pure toluene is 60 torr. For a solution with a composition of x b e n z e n e = 0.2 , what is the partial pressure of toluene ( P t o l u e n e )?

Group of answer choices

12 torr

36 torr

48 torr

84 torr

90 torr

180 torr

Q2:

For a two-component solution under equilibrium conditions, it can be stated that μ 1 s l n = μ 1 v a p for one of the two components in the system. If this equality is true, then we can also state that:

(select all correct answers)

a)μ1sln=μ2sln

b)μ2sln=μ2vap

c)x1=y1

d)x2=y2

e)

Q3:

For the reaction A + B ⟶ C, the following rate constant was determined empirically:

d [ C ] d t = k ⋅ [ A ] ⋅ [ B ] 2

What are the units of the rate constant (k) in this expression?

Group of answer choices

s−1

L2⋅mol−1⋅s−1

L2⋅mol−2⋅s−1

L12⋅mol−12⋅s−1

Q4:

You have a binary mixture of CS₂ and dimethoxymethane. You measure the partial pressure of CS₂ as a function of the solution composition at T=300 K, and you find the following:

What is the activity of CS₂ (i.e. , what is a C S 2) at x C S 2 = 0.3 ?

Group of answer choices

0.3

0.4

1.0

1.2

1.33

2.5

Answer 1