Phosphorus is an eleneat commonly found in the infernal regions. It exists in va
ID: 898969 • Letter: P
Question
Phosphorus is an eleneat commonly found in the infernal regions. It exists in various forms called allotropss. Cons-. De: the reaction at 1210 K (15 points): P4(g) doubleheadarrow 2 P2(g) In a 4.0 L container, at 1210 Kelvin. an equilibrium mixtrre is found to consist of p(P4) = 0.250 atm and P(P2) = 1.40atm. Determine the valie cf the equilibrium constant Kp, at this temperature. Kp = Suppose that aner nixmre of gases is produced also at 1210 K where: P(P4)=1.81 times 10^- atm and p(P2) = 0.119 atm. Calculate die reaction quotient. deternmine whether for these conditions, the reaction is sponaneous to the right (R); spointaneous to die left (L); or at equilibrium CE); calculate the value of Ke; and calculate the value of delta G Q = Reaction is: Kc = deltaGdegree = kJ,molExplanation / Answer
Answer – there is given reaction –
P4(g) <-----> 2 P2(g)
a)At equilibrium , p(P4) = 0.250 atm , p(P2) = 1.40 atm
we know the Kp expression for this reaction
Kp = p(P2)2 / p(P4)
= (1.40)2 / 0.250
= 7.84
b) At initial p(P4) = 1.81*10-3 atm , p(P2) = 0.119 atm
we know reaction quotient , Q = p(P2)2 / p(P4)
= (0.119)2 / 1.81*10-3
= 7.82
So the Kp and Qp are the same, means reaction is at equilibrium (E)
We know
Kp = Kc*(RT)n
7.84 = Kc * (0.0821*1210 K)1
Kc = 7.84 / 0.0821*1210
= 0.0789
We know,
Go= -RTlnK
= -8.314 J/mol.K *1210 K * ln 7.84
= - 20715 J/mol
= - 20.7 kJ/mol