đề thi cao học hóa 2007

. 2. Su phan huj'ch6t A xiy ra theo quy h,rit phan lng bOc mOt. N6u ndng d0 ban dAu cua chat A btng 5.10'' (moU[)tli saul500 giriy, n6ng cfO chdt A cdn lwlit0,05.10'' (moUD. a. Tffi hdng s6 t6c d0 phan rmg vd thoi gian nria ph6n img (r,,r). b. N6u tEng ndng d0 ch6t A 16n 3 l6n thi thdi gian nrla phan img se thay d6i nhu th6 ndo? Vi sao? Ciu 4 Cho phan rmg oxi ho6 - khrl xay ra nhu sau: 6Fe2*(1,0M+crrQr"(o,sM;+t+tf(3,0M) +2cl\o,ztv9+ene3*1z,oM;+zuro6; 1. Thanh lflp so d6 pin di&r theo phan ring tr6n. Vi6t c6c phan rmg xiy ra d cac diQn sgc. 2. Tinh srlc di€,n dQng @) cna pin Cho thd kld, fiat chttin Qf,.r*n,* : 0,77 (1, vd Qi+oi wrrz""* : 1,33 (l). 'Ciu5 X6t nguy6n tr! Ga. Dga vdo phuong phdp gin CUng Slater, hEy tinh ndng luqng cia cric eleofon 2s, 3p, 3d vi 4s. Cdu 6 Cho ph6n tu FuC: C : CF2. IISy cho bi6t dang lai ho6 oria c6o nguy6n tu C trong phdn tt, tu d6 m6 ta su hinh thanh c6c li6n kdt nong phdn tu vd dr,t doan cdu tnic hinh hsc cia phan tu. Nhdn xe vA s.u dinh huong kh6ng gian cria hai mit ph8ng chrla nh6m CF2 6 hai ddu mach. Ciu 7 1. Gpi t6n phrlc chdt sau: Na2[Zn(OIfa] 2. Dung thuy6t VB hdy dv doan c6u trfic hinh hqc cho c6c phrtc co sO ph6i tri + ctaZnz* . 3. Tai sao c6c phrlc ctnZt* d.as6 kfi6ng mdu? Cho dipn ttch hqt nhdn da C, F, Zn vd Ga Lin ttt.ot t&ng A, g, 30 rn 31. f + / l'-e^c" B0 ctAo DUC vA DAo rAo Ho vd r€n thf sinh: DN Hec HUE \o Ht' sa bao danh: ' +; Ki'THr ruyEN sINH sAU DAI Hgc xAm 2007 M6n thi: Ccr sO Lf thuy6t cdc qu6 trinh h6a hgc vdr c6u t4o chdt (ddnh cho Cao hoc) Thbi gLarL hm bai: 180 phrit Cfiu 1 Thi0u nhiQt chudn oiua CzH+(Lhi) vd C(than chi) len luqt ld, -337 kcal.mol-l vd -94,05 kcal.mol-l. Sinh nhiqt chu6n cua l{zO(long) ld -68,32 kcal.mol-t, Hay tinh sinh friQt chudn cua c2H4(khi). Ciu 2 1. Thi6t lap biOu thric li0n hQ gita d0 diQn Iy ovdh6ng sO dien ly KdOi vdi ch6t di6n ly y6u AB vi n6u nhan x6t. 2. Ciinhod tan bao nhiOu gam ducrng Saccaro (CnHzzO11) vdo 100 gam nudc dC thu dugc dung dich c6: a. Nhi0t d0 d6ng dac li -0,O2oC? b. NhiOt dO sdi la 100,050C? ni6t hettg s6 nghiQm d6ng vd h5ng s6 nghiQm s6i cria nudc tan lugt ld Kd: 1,86 ve & - 0,51 . Ciu 3 1. Phet biOu n6i dung vi vi nQi dung vi vitit biOu thuc m6 ta dinh lu0t t6c dung 1d16i luqng. Ghi chrt: Can b0 coi thi khdng gidi thich gi thAm. . sINH sAU DAI Hgc xAm 20 07 M6n thi: Ccr sO Lf thuy6t cdc qu6 trinh h6a hgc vdr c6u t4o chdt (ddnh cho Cao hoc) Thbi gLarL hm bai: 180 phrit Cfiu 1 Thi0 u nhiQt chudn oiua. -94,05 kcal.mol-l. Sinh nhiqt chu6n cua l{zO(long) ld -68, 32 kcal.mol-t, Hay tinh sinh friQt chudn cua c2H4(khi). Ciu 2 1. Thi6 t lap biOu thric li0n hQ gita d0 diQn Iy ovdh6ng. A 16n 3 l6n thi thdi gian nrla phan img se thay d6i nhu th6 ndo? Vi sao? Ciu 4 Cho phan rmg oxi ho6 - khrl xay ra nhu sau: 6Fe2*(1,0M+crrQr"(o,sM;+t+tf(3,0M) +2clo,ztv9+ene3*1z,oM;+zuro6; 1.