HELP WITH ALL OF THEM PLEASE 4. Which statement is true for this reaction at equ
ID: 698248 • Letter: H
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HELP WITH ALL OF THEM PLEASE
4. Which statement is true for this reaction at equilibrium? Naa) 3Huo, 2NHon A. The rate of the forward reaction is greater than the rate of t B. The rate of the forward reaction equals the rate of t C. Neither the forward nor reverse reaction proceeds a D. The concentrations of the reactants and products are e he rev reaction se reaction he rever t equilibrium I. Look f 15. For a reaction at equilibri um at a particular pressure and temperature, which is true? B. AGO C. AG =0 16. Use 2 nformation in the chart below to approximate the bolling point of bromine Substance. AH', in kJ/mol J/(mol*K) . 152 245 C. 127K 0 31 D. 333K A. 31°C B. 40.°C 17. The value ofG" for an oxidation-reduction reaction is-618 kJ, which describes E and Keq for the reaction? A. B. C. positive positive negative negative greater than 1 less than 1 greater than 1 less than 1 18. Which process is an oxidation? A. CrO4-2 Cr2O7-2 B. CIO3.1 CIO2 C. 2 Br-1 Br2 D. MnO4-1 MnO2 19. Consider these reductions Mg+2 + 2e- Mg E--2.37V Which reaction occurs spontaneously at standard conditions? B. Mg+2 + Cd Mg + Cd+2 20. What is the ground-state electron configuration for Cr3+ (z- 24)? A. [Arl 4s2 37 B. [Ar] 4s2 3d1 C. Ar] 3d3 D. [Ar] 4s1 3d2Explanation / Answer
14. B. The rate of forward reaction equal the rate of thereverse reaction.
15. at equilibrium DG = 0
c. DG = 0
16. Br2(l) -----> Br2(g)
DH rxn = 31-0 = 31KJ/mole
DS = 245-152 = 93J/mole-K = 0.093J/mole
DG = DH-TDS
0 = 31-T*0.093
31 = 0.093T
T = 31/0.093 = 333K
D. 333K
17. DG^0 = -nE0cell*F
DG^0 = -RTlnK
A E0 is positive keq is greater than 1
18.c. 2Br^- -----> Br2
Bromine oxidation number is increases from -1 to 0 . it is oxidation reaction.
19. D. Cd^2+ + Mg -----> Cd + Mg^2+
20.Cr= 24 [Ar] 4s^1 3d^5
Cr^3+ [Ar] 3d^3
c.[Ar] 3d^3
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