Test: Chemia Fizyczna test 1

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Chemia Fizyczna test 1

Pytanie 9

How many degrees of freedom would have:

Pytanie 10

For the concentration cell Ag|Ag+(c1)||Ag+(c2)|Ag

ΔrS⊕ > 0 for c2>c1

emf is positive if c2>c1

ΔrG=0

Emf is equal to zero for c2=c1

ΔrG=0

Pytanie 11

The mobility of H+ ions in sulphuric acid solutions:

decreases with the acid concentration

decreases with temperature

increases with temperature

is equal to 2tH+ ΛH2SO4

Pytanie 12

The rate of reaction 2A+B->3C is equal to:

1/3d[C]/dt

3 d[C] /dt

k[C]^3

2 d[A]/dt + d[B]/dt

-k[C]^3

Pytanie 13

In second-order reaction (nie pamiętam równania)

t ½ jest odwrotnie proporcjonalny do [A]

zależy od [A]^2

t ½ nie zależy od temperatury

Pytanie 14

In reactions A+B---(k1)--->C 2C---(k2)--->D k2>>k1 Therefore:

rate of formation of [D] is approx. first order in [A]

the steady-state approx. can be used for [C]

[D] =~ (k2)/(2k1) * [C]

d[D]/dt =~ (k1k2)/(k1+k2) * [A][B]

the steady-state approx. cannot be used for [B]