Strona 2
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
Emf is equal to zero for c2=c1
ΔrG=0
emf is positive if c2>c1
ΔrG=0
ΔrS⊕ > 0 for c2>c1
Pytanie 11
The mobility of H+ ions in sulphuric acid solutions:
is equal to 2tH+ ΛH2SO4
decreases with the acid concentration
decreases with temperature
increases with temperature
Pytanie 12
The rate of reaction 2A+B->3C is equal to:
1/3d[C]/dt
-k[C]^3
k[C]^3
2 d[A]/dt + d[B]/dt
3 d[C] /dt
Pytanie 13
In second-order reaction (nie pamiętam równania)
t ½ nie zależy od temperatury
zależy od [A]^2
t ½ jest odwrotnie proporcjonalny do [A]
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]
d[D]/dt =~ (k1k2)/(k1+k2) * [A][B]
the steady-state approx. cannot be used for [B]
the steady-state approx. can be used for [C]
[D] =~ (k2)/(2k1) * [C]