Question

QUESTION 47

1. Determine the equilibrium constant for the following reaction at 581 K.

   HCN(g) + 2 H2(g) → CH3NH2(g)      ΔH° =  -158 kJ;  ΔS°= -219.9 J/K

   		3.99 × 1012
   		3.26 × 10-12
   		13.0
   		2.97 × 1011
   		0.002
   		4.92 × 1025
   		3.4 × 10-12
   		None of these
   		523.2

QUESTION 48

1. The standard emf for the cell using the overall cell reaction below is +2.20 V:

               2Al(s) + 3I2 (s)  →  2Al3+ (aq) + 6I- (aq)

   The emf generated by the cell when [Al3+] = 1.3 × 10-4 M and [I-] = 0.044 M is ________ V.

   		2.18
   		2.20
   		2.25
   		none of these
   		2.32
   		2.51
   		2.36
   		2.67

Answer 1

047 HENLg + 24 g → CH₃NH2 AH = -15 863) AS = -219. 3 Jk AG-AH-TAS → Gibb's Brelo energy AGO -15B X183 – (581) (-219,9) 3o -30238.1 AGE - AGB -- :-RT ln K Кеу -30478 4 J (8.314) (581) In kea 6.29599.5 lakeq +6.2599 keg = ė keq 523.16 a 523.2 named ملخص ken CScanned with CamScanner

444 EU = +2:24 6 Ecell = 2.2 + 0.059 (15.911) 2Al(s) + 34 6 DAH b) +6 I lag. CAPA] = 13810-4 m C1-1=0.044 M Exay__2:356 V Ecou. 2.36V to Nernet Equation Arenting Eu - – 0.059 lag Caly? C178 NE n 7 nouge exchanged Ecoln = 2.2 0-oşg leg (1:3110") (0.047) Exeta 2.2-0.059 log fo.ccc13) (0.644)! 6 6 Econ = 2.2 coesg dog (1:59 10 °) (1.256 Mb) Ecell = 2.2 - Docs CSScanned with CamScanner I dog (12.24284 X10***