In an experiment, 15 mL of 1.0 M NazCO3 was reacted with 5 mL 2.0 M Ca(NO3)2. Calculate the AG of the reaction if it was kept at 25°C Thermodynamic data: AH°pn=-66 kJ/mol AS°pn= -501 J/mol-K O . 84.23 kJ/mol O b. 65 kJ/mol O c. -83.5 kJ/mol O d. 83.3 kJ/mol

(H2 ) →(12 ) +( 2HI) (AS = 82.4 J/K ),(AH = 25.9 KJ/K ) %3D %3D Calculate AG for this reaction at 25 C°

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The equilibrium constant for a certain reaction decreases from 8.87 to 3.25 x 10-2 when the temperature increases from 25°C to 75°C. Hint: Manipulate the following equation. In(K) = -AH° ASO + ᎡᏆ R a Estimate the value of AS° for this reaction. AS⁰ = J/K - mol

Determine the value of AG for the reaction at 309 K. Assume standard concentration 2NH;(g) = N,H,(g) + H, (g) Given AH (kJ/mol) S°J/{mol · K)) Substance NH3(3) -46.1 192.5 95.35 N2H4(g) H2(3) 238.5 0.0 130.6 O-87.0 kJ -182.5 kJ O -192.6 kJ O 87.0 kJ O 192.6 kJ

18. Given the AG°S for the reactions, calculate Ks. Values given for 298 K AG° -560.3 kJ 2 H2(g) a. CH4(g)+2 F2(g) 4(g) 2 NO)Cl2(g) 2 SO3() AG° +40.8 kJ b. 2 NOC (g) AG° = -140.0 kJ c. 2 SO2(g) O2(g)

One of the reactions that destroys ozone in the upper atmosphere is NO(g) + O3(g) ⇒ NO2 (g) + O2(g) Substance and State AGf (kJ/mol) NO(g) 87 NO₂(g) 52 0₂ (9) 0 03 (9) 163 a Calculate ΔG° (at 298 K) for this reaction. AG = -198 kJ b Calculate K (at 298 K) for this reaction. K =

The enthalpy of vaporization of CH3OH is 6.40 kJ/mol. What is the entropy change for vaporization of 20.0 g CH3OH if the boiling point of it is 40.0 0C? (atomic weight in amu: C 12.00; H 1.00; O 16.00) OA. 5.0 /k O B. 12.8 J/K Oc. 20.5 J/K 18.5 J/K OD. 100 J/K OE.

8. Given that Ksp for Agl(s) = 8.3 × 10-17 and Kf for [Ag(CN)₂] = 1.0 × 10²¹ at 25°C, what is the AG for the following reaction at the same temperature? Agl(s) + 2 CN- (aq) = [Ag(CN)₂]-¯(aq) +1-(aq)