1. For a certain gas phase reaction AG° = -136.4 – T × (+0.3142) in units of kJ and K. Based on this information is each of the following statements true or false? Indicate your choice by circling T (if the statement is TRUE) or F (if the statement is FALSE a. The reaction is exothermic. T F b. The entropy of the system increases during this reaction. T F c. The products are lower in energy than the reactants are. T F d. The bonding is stronger in the reactants than in the products. T F At ten mnerature T 595 K the equilibrium conctant K: 1 т

Without doing any calculations, match the following thermodynamic properties with their appropriate numerical sign for the following endothermic reaction. 2N₂(g) + O₂(g) →2N₂O(g) AHrxn ASrxn AGrxn AS universe > 0 0 low T, 0 high T Previous Next

Σ *00 For a particular reaction, AH = 81.95 kJ and AS = 27.0 J/K. Calculate AG for this reaction at 298 K. AG = %3D What can be said about the spontaneity of the reaction at 298 K? O The system is spontaneous in the reverse direction. O The system is at equilibrium. O The system is spontaneous as written. 8:12 PH (口 四< 11/8/20 F5 F8 F12 PrtScr Insert Delete Backspace $4 % 8. 5. 7. 24 Alt Ctri

Use data from Appendix attached to calculate ΔS∘rxnΔ�rxn∘ for each of the reactions given. SO2(g)+12O2(g)→SO3(g)SO2(g)+12O2(g)→SO3(g) Express your answer using one decimal place in J/K.

A styrofoam calorimeter contains 60.0 mL of o.750 M H.C,H 0, at 3 6 22.8°C. When 9.83 g NaHCO, is added to the calorimeter, the temperature of the resulting solution decreases to a minimum of 5.1°C. The reaction that occurs is: HаCоН,О-(aд) + 3 NaHCO3(aq) > NagCgHsО7(ag) + 3 СО2(9) + 3 Н-0(1) AHreaction = ??? What is the (experimental) enthalpy change for this reaction, AH ? (Use the total mass of reaction solution and 4.18 J/(g °C) for the specific heat of the solution in your calculations.) kJ/mol

The sign of AH for the process NaCl(s) NaCI(1) is --> O positive, and the process is endothermic. O negative, and the process is endothermic. O positive, and the process is exothermic. O negative, and the process is exothermic.

PLEASE SHOW YOUR WORK (THIS IS NOT A GRADED ASSIGNMENT)

25°C 32°C bum wohl 891 10 228 1. Two aqueous reactants are mixed in a flask with a balloon over the top and the following change is observed. What are the signs on q and w for the system? Enter >, <, or in each box below. W 0 2. You drop a piece of potassium metal into water and the following exothermic reaction occurs: 2 K(s) + 2 H₂O(l) → 2 KOH(aq) + H₂(g) What are the signs on q and w for this reaction, at constant temperature and pressure? A) q is positive and w is negative. B) q is negative and w is positive. C) q and w are both negative. D) q and w are both positive. E) There is not enough information given. 3. What is the change in internal energy when one mole of helium gas in a flexible-walled container at STP is heated to 100°C? (CHe(g) = 5.30 J/g°C) AU =