Land final. 94

# Land final. 94 - Name(Put name on all pages TA Lab Section...

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1 1.(4 pts) The thermochemical equation which defines the standard molar enthalpy of formation of AgBr(s) is A. 2Ag(s) + Br 2 (l) ---> 2AgBr(s) B. Ag(s) + Br(g) ---> AgBr(s) C. 2Ag(s) + Br 2 (g) ---> 2AgBr(s) D. Ag(s) + 1/2Br 2 (l) ---> AgBr(s) E. AgBr(s) <==> Ag + (aq) + Br - (aq) 2.(4 pts) The molar heats of vaporization of the halogens, X 2 , increase from top to bottom on the periodic table due to: A. hydrogen bonding B. London forces C. dipole-dipole forces D. ion-ion forces E. ion-dipole forces 3.(4 pts) The following process Na 2 SO 4 •10H 2 O(l) ---> Na 2 SO 4 •10H 2 O(s) and the sign of the enthalpy change are A. fusion, positive B. sublimation, positive C. condensation, negative D. melting, positive E. fusion, negative 4.(4 pts)All of the following are soluble in water except: A) AgClO 4 B) Na 2 CO 3 C) PbCl 2 D) AgNO 3 E) NaCl
2 5.(4 pts) Consider the following reaction CaCO 3 (s) <==> CaO(s) + CO 2 (g) The equilibrium constant expression for this reaction is A) K c = [CaO]/[CaCO 3 ] B) K c = 1/[CO 2 ] C) K c = [CaO][CO 2 ]/[CaCO 3 ] D) K c = [CO 2 ] E) K c = 1/[CaCO 3 ] 6.(6 pts) Fill in the following table: (No credit for incorrect formulae or charges.) conjugate acid conjugate base HNO 3 __________ __________ (CH 3 ) 3 N __________ H 2 O H 2 O __________ __________ ClO

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Land final. 94 - Name(Put name on all pages TA Lab Section...

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