QUESTION 3. a) Find the AH for the reaction below, given the following reactions and subsequent AH values: H2SO () - SO,((g) + H;0(g) H2S(g) + 2Oz(g) + H,SO,1) H2S(g) + 2 O2(g) → SO3(g) + H2O(1) AH =-235.5 kJ H2O(1) → H20(g) AH =-207 kJ AH = 44 kJ b) Do you expect the overall reaction to be exothermic or endothermic. Justify your answer. C) Using the answer from part a. Calculate the change in energy if 67.5 g of SO3 was collected during the experiment d)lf the 67.5 grams of SO3 were collected at 31 degrees Celsius, at 2.5 atm, calculate the volume of the collected gas. QUESTION 4. Movable Piston Valve O,(g) a) During an experiment Oxygen gas was collected in a container as shown above. The gas was collected at 25 degrees Celsius and 2.4 atm. The size of the container above is 5.4 Liters. Calculate the density of the gas in g/ml. b) After collecting all the gas, the student pushed down the piston to half of the original Volume and measured the temperature, which remained at 25 degrees Celsius. How did this action change the density of the gas calculated in part b? Justify your answer with sample calculations.

QUESTION 3. a) Find the AH for the reaction below, given the following reactions and subsequent AH values: H2SO () - SO,((g) + H;0(g) H2S(g) + 2Oz(g) + H,SO,1) H2S(g) + 2 O2(g) → SO3(g) + H2O(1) AH =-235.5 kJ H2O(1) → H20(g) AH =-207 kJ AH = 44 kJ b) Do you expect the overall reaction to be exothermic or endothermic. Justify your answer. C) Using the answer from part a. Calculate the change in energy if 67.5 g of SO3 was collected during the experiment d)lf the 67.5 grams of SO3 were collected at 31 degrees Celsius, at 2.5 atm, calculate the volume of the collected gas. QUESTION 4. Movable Piston Valve O,(g) a) During an experiment Oxygen gas was collected in a container as shown above. The gas was collected at 25 degrees Celsius and 2.4 atm. The size of the container above is 5.4 Liters. Calculate the density of the gas in g/ml. b) After collecting all the gas, the student pushed down the piston to half of the original Volume and measured the temperature, which remained at 25 degrees Celsius. How did this action change the density of the gas calculated in part b? Justify your answer with sample calculations.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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The problem in question is number 2 in the picture. Thanks a bunch!
Given the reactions, X(s) + 1/2O₂(g) XCO₂ (s) XO(s) XO(s) + CO₂(g) what is AH for this reaction? X(s) + 1/2O₂(g) + CO₂(g) AH = -763.1 kJ AH = +159.3 kJ XCO3(s)
Calculate the enthalpy change for the following reaction, _C₂H4 (9) + using the following standard heats of formation: AH(C₂H4) = +52.5 kJ/mol; AH(CF4) =-933.0 kJ/mol; AH (HF) =-271.6 kJ/mol _F₂(g) → _CF4(g) + _HF(g)
Consider these reactions: Reaction 1: H2(g) + Cl2(g) 2HCI(g) AH = -184.6 kJ Reaction 2: 20F2(g)- O2(g) + 2 F2(g) AH = -49.4 kJ Reaction 3: N2(g) + 202(g) 2NO2(g) AH = +66.4 kJ Reaction 2 can be described as an [Select] [ Select ] reaction
4. Hess's Law Calculate AH for the reaction: 2 C(s) + H2(g) → C:H2(g), given the following chemical equations and their respective enthalpy changes: C2H2(g)+02(g)→2CO2(g)+H20(1) AH, = -1299.6 kJ (1) %3D C(s)+02(g)→CO2(g) AH, = -393.5 kJ (2) H2(g)+502(g)→H20(1) AH3 = -285.8 kJ (3)
If AH for the reaction 2 HgO → 2 Hg (1) + O2 (g) is 181.66 kJ, (s) then AH for the reaction + ½ O2 (g) → HgO Hg (1) (s) is:
Given the following reactions: N2 (g) + O2 (g) → 2NO (g) AH = +180.7 kJ 2N20 (g) → O2 (g) + 2N2 (g) AH = -163.2 kJ the enthalpy of reaction for 2N20 (g) → 2NOo (g) + N2 (g) is kJ. -343.9 343.9 -145.7 145.7 O 17.5
2. Calculating enthalpy: AH = -206 kJ mol¹¹, 3 Fe(s) + 2 O₂(g) → Fe3O4 (S) AH = -136 kJ mol-¹, a) Given 2Fe(s) + 1.5 O₂(g) → Fe₂O3 (S) determine AH, for the following reaction: 4Fe₂O3(s) + Fe(s) → 3Fe3O4 (s) Is this reaction exothermic or endothermic? Is this enough information to inform whether this reaction occurs or not? O b) Given AH vap of water at 373 K = 40.7 kJ mol¹¹, C₂(l)=75.2 J mol¹¹K²¹ and ₂(g)=33.6 J mol¹¹K²¹, calculate AHvap of water at 298 K.
1) PCI3(1) + Cl2(g) - PCI5(g) Jse equations (2) and (3) to calculate AHrxn of equation (1): 2) P4(s) + 6Cl2(g)→ 4PCI3(1) AH =-1280 kJ 3) P4(s) + 10C12(g) → 4PCI5(g) AH =-1774 kJ
The enthalpy changes, AH, for three reactions are given. H, (g) + H, O(1) AH= -286 kJ/mol Ca(s) + 2 H*(aq) Ca2+(aq) + H, (g) Ca+(aq) + H, O(1) AH = -544 kJ/mol CaO(s) + 2 H*(aq) AH = -193 kJ/mol Using Hess's law, calculate the heat of formation for CaO(s) using the reaction shown. Ca(s) + O,(g) CaO(s) AH kJ/mol
Q4: Calculate the enthalpy of the reactions below: 1. H;Om + CO2 (aq) - H,CO3 (aa) 2. H;POalag) + 3OH, → 3H;0m + POaloa) 3. C;Ha (a) + 302 () → 2H,06) + 2CO2 (9) AHP of H,CO3 (oa) is -699.65 kJ/mole
i keep getting a different answer than that one, help me solve this. thanks