Answer all the questions from 3 to 9 8:24 AM ...2.2KB/s l Vo LTE 86 CHEMISTRY assign...

Answer all the questions from 3 to 9

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8:24 AM ...2.2KB/s l Vo LTE 86 CHEMISTRY assign... CHEMICAL THERMODYNAMICS OBJECTIVE CHEMISTRY IR Two mole of an ideal gas is expanded irreversibly and isothermally at 37°C until its volume is doubled and 3.41 kJ heat is absorbed from surroundings. AS, (system + surroundings) is 3. total a) – 0.52 J/K b) 0.52 J/K c) 22.52 J/K The efficiency of the reversible cycle drawn in the fig. will be d) 0 4. 250 a) 33.3% b) 56% 150 c) 66% d) 25% 1000 1500 Entropy JK In the conversion of lime stone to lime, CaCO19→ CaOs) + CO2(g)" +179.1 kJ mol and 160.2 JK-' mol-' respectively at 298 K and 1 bar. Assuming, AH° and AS° do not change with temperature; temperature above which conversion of lime stone to lime will be spontaneous is a) 1118 K 5. the values of AH° and AS° are b) 1008 K c) 1200 K d) 845 K 6. In an irreversible process taking place at constant T and P and in which only pressure volume work is being done, the change on Gibb's free energy (dG) and change in entropy (dS), satisfy the criteria a) (dS)v.s < 0,(dG)T.P <0 c) (dS)v,E = 0,(dG)r,p = 0 b) (dS)v,E > 0,(dG)T.p <0 d) (dS)v,E = 0,(dG)†.p >0 The molar entropies of HI, He) and I at 298 K are 206.5, 114.6, and 180.7 J mol- K-l respectively. Using the AG° given below, calculate the bond energy of HI. 7. (g) HIg→H, + Ig); AG° = 271.8 kJ (3), a) 282.4 b) 298.3 c) 290.1 d) 315.4 For the hypothetical reaction A2+ B2) =2AB) 4,G° and A,S° are 20 kJ/mol and -20 JK-'mol· respectively at 200 K.If A,C, is 20 JK' mol- then A,H at 400 K is 8. a) 20 kJ/mol b) 7.98 kJ/mol c) 28 kJ/mol d) None of these For a perfectly crystalline solid C aT, where a is constant. If C. p.m. is 0.42 J/K-mol at 10 K, molar 9. p.m. entropy at 10 K is a) 0.42 J/K-mol b) 0.14 J/K-mol c) 4.2 J/K-mol d) zero Scanned with CamScanner Temp K) 8:24 AM ...2.2KB/s l Vo LTE 86 CHEMISTRY assign... CHEMICAL THERMODYNAMICS OBJECTIVE CHEMISTRY IR Two mole of an ideal gas is expanded irreversibly and isothermally at 37°C until its volume is doubled and 3.41 kJ heat is absorbed from surroundings. AS, (system + surroundings) is 3. total a) – 0.52 J/K b) 0.52 J/K c) 22.52 J/K The efficiency of the reversible cycle drawn in the fig. will be d) 0 4. 250 a) 33.3% b) 56% 150 c) 66% d) 25% 1000 1500 Entropy JK In the conversion of lime stone to lime, CaCO19→ CaOs) + CO2(g)" +179.1 kJ mol and 160.2 JK-' mol-' respectively at 298 K and 1 bar. Assuming, AH° and AS° do not change with temperature; temperature above which conversion of lime stone to lime will be spontaneous is a) 1118 K 5. the values of AH° and AS° are b) 1008 K c) 1200 K d) 845 K 6. In an irreversible process taking place at constant T and P and in which only pressure volume work is being done, the change on Gibb's free energy (dG) and change in entropy (dS), satisfy the criteria a) (dS)v.s < 0,(dG)T.P <0 c) (dS)v,E = 0,(dG)r,p = 0 b) (dS)v,E > 0,(dG)T.p <0 d) (dS)v,E = 0,(dG)†.p >0 The molar entropies of HI, He) and I at 298 K are 206.5, 114.6, and 180.7 J mol- K-l respectively. Using the AG° given below, calculate the bond energy of HI. 7. (g) HIg→H, + Ig); AG° = 271.8 kJ (3), a) 282.4 b) 298.3 c) 290.1 d) 315.4 For the hypothetical reaction A2+ B2) =2AB) 4,G° and A,S° are 20 kJ/mol and -20 JK-'mol· respectively at 200 K.If A,C, is 20 JK' mol- then A,H at 400 K is 8. a) 20 kJ/mol b) 7.98 kJ/mol c) 28 kJ/mol d) None of these For a perfectly crystalline solid C aT, where a is constant. If C. p.m. is 0.42 J/K-mol at 10 K, molar 9. p.m. entropy at 10 K is a) 0.42 J/K-mol b) 0.14 J/K-mol c) 4.2 J/K-mol d) zero Scanned with CamScanner Temp K)