1 a notarea varia \u021b iei entalpiei de reac \u021bie rH 802 kJ 1p b precizarea tipului

1 a notarea varia ț iei entalpiei de reac ție rh

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1. a. notarea varia ț iei entalpiei de reac ț ie: r H 0 = - 802 kJ (1p) b. precizarea tipului de reac ț ie: reac ț ie exoterm ă (1p) c . ra ţ ionament corect (2p), calcule (1p), (s) 0 f CuS H = - 53,1 kJ/mol 5 p 2. ra ţ ionament corect (1p), calcule (1p), Q = 80,2 kJ 2 p 3. ra ţ ionament corect (1p), calcule (1p), 2 H O m = 50 kg 2 p 4. ra ţ ionament corect (3p), calcule (1p): r H 0 = r H 1 0 + r H 2 0 - r H 3 0 4 p 5. precizarea tipului reac ț iei: reac ț ie endoterm ă 2 p Subiectul G. 1. notarea rolului argintului: catalizator 1 p 2. ra ț ionament corect (2p), calcule (1p), 2 O m = 80 g 3 p 3 . ra ț ionament corect (2p), calcule (1p), m NaOH = 0,08 g 3 p
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Ministerul Educa ţ iei ș i Cercet ă rii Centrul Na ț ional de Politici ș i Evaluare în Educa ț ie Prob ă scris ă la chimie anorganic ă Varianta 6 Barem de evaluare ş i de notare Pagina 2 din 2 4. a. ra ț ionament corect (1p), calcule (1p), 2 H O m = 540 g b. ra ț ionament corect (1p), calcule (1p), N = 7,2264 · 10 23 molecule 4 p 5. a. pentru valoarea numeric ă a constantei de vitez ă k = 1,25 ° 10 -5 (1p), pentru unitatea de m ă sur ă L·mol -1 ·s -1 (1p) b. scrierea rela ț iei matematice dintre viteza medie a transform ă rii reactantului (A) ș i viteza medie de formare a produsului de reac ț ie (B) (2p) 4 p
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