Esame Gennaio AT

If

 $\Delta G°_r^{ }<0$  a reaction is shifted to:

• the products

• to the reactants

• to the products if the reaction is exothermic

• to the reactants if the reaction is endothermic

the standard state of a liquid component in a reaction is defined as

• T=25°C, P of the system, component in the reacting mixture, ideal state

• T and P of the system, components in the reacting mixture, ideal state

• T=25°C, P=1 bar, pure component, ideal state

• T of the system, P=1 bar, pure component, real state

which of these equations is correct for a multicomponent open system

• $dH=TdS+VdP+\sum_{i=1}^N\mu_idn_i$

• $dH=TdS-PdV-\sum_{i=1}^N\mu_idn_i$

• $dH=TdS-VdP+\sum_{i=1}^N\mu_idn_i$

• $dH=TdS-PdV+\sum_{i=1}^N\mu_idn_i$

the diagram in the figure is referred to

• an immiscible system

• a partially miscibile system

• a fully miscible system

• an ideal system

the relative adsorption of a surfactant with respect to the solvent

 $\Gamma_2^{\left(1\right)}$  is

• > 0

• < 0

• = 0

• it depends on the charge of the surfactant

a mixture of water/benzene/toluene/acetylene is under equilibrium at 1 atm and 20°C. How many phases are present

• 1

• 2

• 3

• 4

at 20°C,

 $P°_{H_2O\text{ § Benz § tol}}=17\ §\ 75\ §\ 22\ \ mmHg$  and  $P°_{acetylene}=43\ atm$  . What is the boiling P of an equimolar mixture?

• about 43 atm

• about 60 mmHg

• about 10 atm

• about 1 atm

at 20°C,
 $P°_{H_2O\text{ § Benz § tol}}=17\ §\ 75\ §\ 22\ \ mmHg$  
 
  and   $P°_{acetylene}=43\ atm$  

  . What is the dew P of an equimolar mixture?

• about 68 mmHg

• About 227 mmHg

• About 50 atm

• About 1 atm

which of the curves in figure corresponds to an ideal system ?

• upper

• middle

• lower

• no one

in an ideal gas mixture the fugacity of the i-component is

• $P_i^0$ at the temperature of the system

• the partial pressure $P_i$

• the chemical potential $\mu_i$

• the partial molar Gibbs free energy