Question

Please show all work

A.)Choose the statement below that is TRUE.

	a.If K < 1, the reaction is spontaneous in the forward direction.
b.	If K < 1, the reaction is spontaneous in the reverse direction.
c,	If K < 1, the reaction is at equilibrium.
d.	Not enough information is given.

B.)Place the following in order of decreasing molar entropy at 298 K.

H₂ Cl₂ F₂

a.	H2 > F2 > Cl2
b.	H2 > Cl2 > F2
c.	F2 > Cl2 > H2
d.	Cl2 > H2 > F2
e.	Cl2 > F2 > H2

C.)Calculate ΔG_rxn at 298 K under the conditions shown below for the following reaction.

3 O₂(g) → 2 O₃(g) ΔG° = +326 kJ

P(O₂) = 0.41 atm, P(O₃) = 5.2 atm

a.	-47.4 kJ
b.	-109 kJ
c.	+332 kJ
d.	+17.8 kJ
e.	+341 kJ

D.)Place the following in order of increasing entropy at 298 K.

Ne Xe He Ar Kr

a.	He < Ne < Ar < Kr < Xe
b.	He < Kr < Ne < Ar < Xe
c.	Ar < He < Ar < Ne < Kr
d.	Xe < Kr < Ar < Ne < He
e.	Ar < Ne < Xe < Kr < He

Answer 1

A) The reaction will move backwards or towards the reactants if K < 1, letter b)

B) As chlorine is the biggest molecule, then fluorine and lastly hydrogen, the order of decreasing entropy will be:

Cl₂ > F₂ > H₂

C) For calculating deltaGrxn -> deltaGrxn = deltaG^o + RTlnQ

Where Q is the reaction quotient:

deltaGrxn = 326 kJ + [0.008314 kJ/molK * 298K * ln[5.2²/0.41³]]

deltaGrxn = 326 + 14.8 = 340.8 = 341 kJ

D) Following same principle of atomic size:

He < Ne < Ar < Kr < Xe