Pytania i odpowiedzi
Chemia Fizyczna test 1
Zebrane pytania i odpowiedzi do zestawu.
Ilość pytań: 14
Rozwiązywany: 2554 razy
Pytanie 1
For a perfect gas:
pV is proportional to absolute temperature
the enthalpy does not depend on pressure
Cv=Cp-nR
Pytanie 2
In a reversible adiabatic process:
ΔU=w
Pytanie 3
The standard enthalpy of combustion of a compound:
is defined at standard pressure
is equal to TΔcSo+ΔcGo
Pytanie 4
The entropy change in an isothermal decompression of a perfect gas against constant pressure p_ext
none from above
Pytanie 5
In first order phase transition:
The heat capacity shows a discontinuity
Entropy shows a discontinuity
thermal expresion coefficient shows a discontinuity
Pytanie 6
The chemical potential μi:
at the triple point of a substance is equal for solid, liquid and vapor
Pytanie 7
the enthopy of mixing:
is equal to -Rlnx in system (raoult's law)
Pytanie 8
The thermodynamic equilibrium constant K:
does not depend on the total volume of the reaction mixture
has a temperature dependence given by the Van’t Hoff law
Pytanie 9
How many degrees of freedom would have:
sulphur vapor in equilibrium with orthorombic sulphur and monochromic sulphur 0
A two-compontnt system with two phases 2
A three-component system with 3 phases if temperature and pressure are fixed 0
ice in water at 1atm 0
Pytanie 10
For the concentration cell Ag|Ag+(c1)||Ag+(c2)|Ag
emf is positive if c2>c1
Pytanie 11
The mobility of H+ ions in sulphuric acid solutions:
decreases with the acid concentration
increases with temperature
Pytanie 12
The rate of reaction 2A+B->3C is equal to:
1/3d[C]/dt
Pytanie 13
In second-order reaction (nie pamiętam równania)
t ½ jest odwrotnie proporcjonalny do [A]
Pytanie 14
In reactions A+B---(k1)--->C 2C---(k2)--->D k2>>k1 Therefore:
the steady-state approx. can be used for [C]
the steady-state approx. cannot be used for [B]