Strona 1

Chemia Fizyczna test 1

Pytanie 1
For a perfect gas:
Molar entropy always increases with temprerature
Molar entropy does not depend on pressure
Cv=Cp-nR
the enthalpy does not depend on pressure
pV is proportional to absolute temperature
Pytanie 2
In a reversible adiabatic process:
ΔT=0
ΔU=w
ΔU=ΔH+Δ(pV) but only for perfect gas
ΔU=w but only for perfect gas
q+w=TΔS
Pytanie 3
The standard enthalpy of combustion of a compound:
is defined at standard pressure
is equal to TΔcSo+ΔcGo
is the the heat effect of reaction of combustion of 1 mole of a compound in air at standard pressure
doesn’t depend on temperature
Pytanie 4
The entropy change in an isothermal decompression of a perfect gas against constant pressure p_ext
none from above
is equal to zero
is equal to (C_v razy delta T)/T
is equal to delta(pV)/T
is equal to -delta(pV)/T
Pytanie 5
In first order phase transition:
The heat capacity shows a discontinuity
The transition entropy is delta H=T delta trans S
Entropy shows a discontinuity
Entropy changes in continous way
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
has a minimum at the critical point
always increases with temperature
can be defined as (dG/dξ)T
doesn’t depend on pressure
Pytanie 7
the enthopy of mixing:
is equal to RTlnx in system (henry's law)
is equal to Rlnx in system (henry's law)
is 0 for perfect gases
is equal to -RTlnx in system (raoult's law)
is equal to -Rlnx in system (raoult's law)
Pytanie 8
The thermodynamic equilibrium constant K:
has a temperature dependence given by the Van’t Hoff law
does not depend on the total volume of the reaction mixture
depends on the partial pressures in the reaction mixture
depends on the molar fractions of reactants and products in the mixture
does not depend on temperature

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