AH* = -827.5 kJ ΔΗ" = -296.9 kJ Use the following reaction information to solve the questions below ΔΗ" = -276,6 kJ 1. OF, (8) + H₂O (1)--> O₂(g) + 2HF (8) 2. SF (8) + 2H₂0 (1)--> 4HF (8) + SO₂ (8) 3. S(s) + 0₂ (8)-> SO₂ (8) Q1. Determine AH (in kJ) at 298 K for the following reaction: 20F, (8)+2S (s)--> SO₂ (g) + SF, (B) ΔΗ" = ??? Q2. From reaction 1, if the reactants react completely, and the total pressure after the reaction completes is 0.99 atm, what is the partial pressure of O₂, in atm? Q3. From reaction 2, at 25 °C, what is the change in internal energy for the reaction, in kJ? Q4. If 42.0 g of sulfur, S, is dropped into 42.0 g of water, where the sulfur started at 68.0 C and the water started at 15.0 °C, what is the final temperature of the water, in °C? Melting point of sulfur is 112.8 °C, for water: C,H20) = 4.184 J/g °C), for S: Ces(s) = 22.75 1/(mol "C) Ronus. From reaction 3, if the reactants reacts completely in an 85.0 L container and of energy at 298 K, what is the total pressure of SO₂(g) (in atm) after

AH Changes sign when a Click on the process is reverNod screen when you started and its derivative demonstrate that the reaction enthalpy, AH, changes sign when a process is reversed. button within the activity and analyze the relationship between the two reactions that are displayed. The reaction that was on the Consider the reaction H2O(1)→H2O(g), AH = 44.0kJ What will AH be for the reaction if it is reversed? Express your answer with appropriate units. > View Available Hint(s) ? HA Value Units

This reaction is _______ (product or reactant) favored under standard conditions at 258 K

A calorimetry experiment determined that the combustion of 1.01 g of H2(g) reacting with excess O2(g) gave q soln=143 kJ.  Calculate ?H for the reaction: H2(g) + 1/2O2(g)-->H2O(l)

O-234 kJ 234 kJ -150. kJ -117 kJ Given: -1835kJ AH°, AHᵒf (kJ/mol) -941 -840 QUESTION 12 Use the standard reaction enthalpies given below to determine AH°rxn for the following reaction: P4(g) + 10 Cl₂(g) → 4 PC|5(s) PC15(s) → PC13(g) + Cl₂(g) P4(g) + 6 Cl₂(g) → 4 PCl3(g) rxn IF7(g) IF 5(9) 2(g) 62.42 = ? ΔΗ° rxn AH°rxn = +157 kJ = -1207 KJ QUESTION 13 Use the AH°f and AH°rxn information provided to calculate AH°f for IF: IF7(9) + 12(g) → IF5(g) + 2 IF(g) AH°rxn = -89 kJ

In a coffee cup calorimeter, 10.0mL of 1.00M AgNo3 and 10.0mLof 1.00M NaCl are mixed and the following reaction occurs (assume reaction goes to completion) Ag+ (aq) + Cl-(aq) ----> AgCl(s) The 2 solutions are intitially at 25.0C and the final temperature is 36.2C. Assuming density of the solution is 1.00g/mL and the heat capactity of the solution is 4.18J/K/g. Calculate q for the reaction in KJ