Consider the following table of K_sp values Which compound listed below has the
ID: 1066767 • Letter: C
Question
Consider the following table of K_sp values Which compound listed below has the smallest molar solubility in water? A) ZnCO_3 B) CdCO_3 C) Cd(OH_2) D) CaF_2 E) AgI In which of the following aqueous solutions would you expect AgBr to have the highest solubility? A) 0.10 M LiBr B) 0.15 M KBr C) 0.10 M AgNO_3 D) pure water E) 0.20 M NaBr Of the following, only__is not a state function. A) q B) E C) T D) 5 E) H F or an isothermal process, Delta S = A) q + w B) q C) qrev D) t_qrev E) rev/T Consider a pure crystalline solid that is heated from absolute zero to a temperature above the boiling point of the liquid. Which of the following processes produces the greatest increase in the entropy of the substance? A) heating the liquid B) melting the solid C) hearing the gas D) heating the solid E) Vaporizing the liquid Delta S is a positive for the reaction__. A) C_2 H_4 (g) + H_2 (g) rightarrow C_2 H_6 (g) B) 2N_2 (g) + 3 H_2 (g) rightarrow 2 NH_3 (g) c) C_3 H_5 (g) + 5O_2 (g) rightarrow 3 CO_2 (g) + 4 H_2 O(g) D) Mg (s) + O_2 (g) rightarrow MgCI_2 (g) E) 2NO (g) + O_2 (g) rightarrow 2NO_2 (g)Explanation / Answer
low value of solubility product refer to very low value of KSp. Hence, silver iodidie is having low solubility.
AgBr is 10000 times more soluble in water. Rest of the components reduce the solubilty due to common ion effect
Except for q, rest of the properites are independent of path and are known as state functions.
for isothermal process. for example, heat of fusion of water at 0 deg.c, entropy chage= Qrev/T
Entropy is degree of disorder, hecne during vaporization degree of disorder increase significantly compared to other changes mentioned.
entropy change is = sum of entropy of products - sum of entropy of reactants
since for calculating the entropy , efficients of products as well as reactants are involved, where ever the sum of coefficients of products are more than reactants ( in case of C , sum of coefficients of proodcuts= 7) and sum of coefficients of reactants= 6. The difference is +ve. Hence entropy change is +ve.
For rest of the reactions, the entropy change is expected to be -ve, since sum of coefficients of products are less than the sum of coefficeits of reactants.