Strona 1

Chemia Fizyczna test 1

Pytanie 1
For a perfect gas:
Molar entropy always increases with temprerature
the enthalpy does not depend on pressure
Cv=Cp-nR
pV is proportional to absolute temperature
Molar entropy does not depend on pressure
Pytanie 2
In a reversible adiabatic process:
ΔU=ΔH+Δ(pV) but only for perfect gas
ΔU=w
ΔU=w but only for perfect gas
ΔT=0
q+w=TΔS
Pytanie 3
The standard enthalpy of combustion of a compound:
is the the heat effect of reaction of combustion of 1 mole of a compound in air at standard pressure
is defined at standard pressure
doesn’t depend on temperature
is equal to TΔcSo+ΔcGo
Pytanie 4
The entropy change in an isothermal decompression of a perfect gas against constant pressure p_ext
is equal to delta(pV)/T
is equal to -delta(pV)/T
none from above
is equal to zero
is equal to (C_v razy delta T)/T
Pytanie 5
In first order phase transition:
thermal expresion coefficient shows a discontinuity
The transition entropy is delta H=T delta trans S
Entropy changes in continous way
The heat capacity shows a discontinuity
Entropy shows a discontinuity
Pytanie 6
The chemical potential μi:
at the triple point of a substance is equal for solid, liquid and vapor
doesn’t depend on pressure
always increases with temperature
can be defined as (dG/dξ)T
has a minimum at the critical point
Pytanie 7
the enthopy of mixing:
is equal to Rlnx in system (henry's law)
is equal to RTlnx in system (henry's law)
is 0 for perfect gases
is equal to -Rlnx in system (raoult's law)
is equal to -RTlnx in system (raoult's law)
Pytanie 8
The thermodynamic equilibrium constant K:
depends on the molar fractions of reactants and products in the mixture
does not depend on the total volume of the reaction mixture
depends on the partial pressures in the reaction mixture
has a temperature dependence given by the Van’t Hoff law
does not depend on temperature

Powiązane tematy

#chemiafizyczna #pwr #samoc