Multiple Choice On the Scantron form, bubble in the letter of the one choice tha
ID: 544053 • Letter: M
Question
Multiple Choice On the Scantron form, bubble in the letter of the one choice that best completes the st question. No credit will be given for multiple answers. 1. Calculate the value for the equilibrium constant Kc of the reaction 2D A + 2 B from the following information: (1/2) A + B C Kc1-3.4 Kc2 0.41 A. 0.72 B. 81 C. 1.96 D. 0.012 9 244 0.51 For benzoic acid 1°(fusion)-18.02 kJ mol-1 and AS(fusion)-45.56 J K-1 mol-l, what is the melting temperature of benzoic acid? A. 2.528 °C B. 2225 C. 122.4 °C D. 472.3 °C E. 199.2°C 2.Explanation / Answer
1)
lets number the reactions as 0,1,2 from top to bottom
reaction 0 can be written as:
reaction 0 = -2*reaction 1 - 2*reaction 2
reaction 0 = -2*(reaction 1 + reaction 2)
Kc = (Kc1*Kc2)^-2
Kc = 1 / (Kc1*Kc2)^2
Kc = 1 / (3.4*0.41)^2
Kc = 0.51
Answer: E
I am allowed to answer only 1 question at a time
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