Homework Answers
Enthalpy of formation of ZnS(s)
Zn(s) + 1/8 S8(s) --------> ZnS(s). ∆H = ?
So using 2nd reaction,
∆H = -∆H2/3
∆Hf(ZnS) = -551.76/3
= -183.92 kj/mol
Add Answer to:
Using any of all of the following chemical equations, determine ΔHf for solid zinc sulfate: AH...
3) The first step in the industrial recovery of zinc from the zinc sulfide ore is...
3) The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting that is conversion of ZnS to ZnO by heating: 2ZNS(s)+ 302[g)2ZnO(s) + 2S02(g) AH--879 KJ/mol Calculate the heat evolved (in KJ) per gram of ZnS roasted. (3 points) 4) Given the thermochemical equations: (3 points) AHO-188 KJ/mol AH-768 KJ/mol Br2)+ F2g) 2BrF(g) Br2)+3F2(g) 2BrF3(g) Calculate the AHm for the reaction BrF(g)+ F2(g) BrF3(g)
Determine the enthalpy change for CS20 + 302(g) + CO2(g) + 2SO2(g); AH= ? using the...
Determine the enthalpy change for CS20 + 302(g) + CO2(g) + 2SO2(g); AH= ? using the following three thermochemical equations, which will be referred to as reactions (A), (B), and (C). (A) 2C(s) + 202(g) 2002(g); AH= -787.0 kJ (B) C(s) + 25(s) → CS2(); AH= 87.9 kJ (C) SO2(g) → S(s) + O2(g); AH= 296.8 kJ 1. The enthalpy change for the unknown reaction is 2. Describe the action performed on each thermochemical reaction. Reaction (A) was Reaction (B)...
Review Problem 6.086 Given the following thermochemical equations, 2Cu + S(s) - Cu2S(s) AH° = -79.5...
Review Problem 6.086 Given the following thermochemical equations, 2Cu + S(s) - Cu2S(s) AH° = -79.5 kJ S(s) + O2(g) → SO2(9) AH = -297 kJ Cu2S(s) + 202(g) → 2CụO(s) + SO2(g) AH° = -527.5 kJ calculate the standard enthalpy of formation (in kilojoules per mole) of Cuo(s). AH°(Cuo(s)) - kJ/mol The number of significant digits is set to 3; the tolerance is +/-2% Show Work is REQUIRED for this question: Open Show Work Review Problem 6.087 Given the...
Write balanced chemical equations for each reaction described below. 1. Synthesis Reactions a) Dipbosborous trioxide is...
Write balanced chemical equations for each reaction described below. 1. Synthesis Reactions a) Dipbosborous trioxide is formed by direct combination of its elements 4P (s)+302(g) → P203 (e) b) Magnesium oxide and carbon dioxide combine to form magnesium carbonate Mgo (s) + CO2(g) → Mg (CO3) (s) 2. Decomposition Reactions a) Potassium chlorate decomposes into potassium chloride and oxygen gas 2KClO3 (ag) → 2 KClO2 lag) + 3 02 (g) b) Calcium sulfate decomposes into calcium oxide and sulfur trioxide...
REPORT SHEET Chemical Reactions and Equations A. Magnesium and Oxygen Sier 1. Initial appearance of Mg...
REPORT SHEET Chemical Reactions and Equations A. Magnesium and Oxygen Sier 1. Initial appearance of Mg ranane 2. Evidence of chemical reaction MgO(s) O2(g) Mg(s)+ 3. Balance: 4. Type of chemical reaction: B. Zinc and Copper(II) Sulfate Evidence of a Chemical Reaction CuSO4(aq) Zn(s) Appearance Appearance ble Stayed vne Time Siwr pcipitnde 1. initial 2. after 30 min . Cu(s)+ZnSO4 (aq) . Zn(s) +CuSO4 (aq) 3. 4. Type of chemical reaction: ingle dsplaument C.Reactions of Metals and HCI 2. Evidence...
Calculate the standard enthalpy of formation of solid magnesium sulfide (MS) using the following thermochemical information:...
Calculate the standard enthalpy of formation of solid magnesium sulfide (MS) using the following thermochemical information: 2 Mg(s) + O2(9) = 2 M90(s) 3 Mg(s) + 5O2(g) = Mg(s) + 2 Mg(s) SO2(g) = S(s) + O2(9) AH = -1203.4 la AH -1504.6 kJ AH = +296.8 kJ AH = 0
6-8 Using the table below, calculate the AH rxn for each of the following equations. Selected...
6-8 Using the table below, calculate the AH rxn for each of the following equations. Selected Standard Enthalpies of Formation at 25° C (298K) AH (kJ/mol) (kJ/mol Formula AH 0 Silver 92.3 Agis) AgC(3) 0 1270 218 Formula AH (kJ/mol Formula Calcium Ca(s) CI (9) Ca(s) 635.1 HC (G) Caco (s)-1206.9 Hydrogen Hig) Carbon C(graphite) 0 H (9) C(diamond) 1.9 Nitrogen COL) -1105 N19) CO(g) -393.5 NH,(g CH_(9) 74.9 NO(9) CH,OHI) -238.6 Oxygen HỎNG) 133 O.) CS.) 87.9 O (9)...
Answer both question below. Show all work and chemical equations. 1. Using the information below answer...
Answer both question below. Show all work and chemical equations. 1. Using the information below answer questions a to c. Ca sº = 41.6 J/mol K CaCO3 (s) sº = 91.7 J/mol K AH° = -1207.6 kJ/mol O2 Sº = 205.2 J/mol K Cao (s) S0 = 38.1 J/mol K AH = -634.9 kJ/mol CO2 (g) sº = 213.8 J/mol K AH° = -393.5 kJ/mol AH° O2 = 0 kJ/mol AH° Ca= 0 kJ/mol a) Calculate AS9rxn and AH°rxn for...
B. Write a balanced chemical reaction for the following word equations. (7 points) a. Potassium chlorate decompose...
B. Write a balanced chemical reaction for the following word equations. (7 points) a. Potassium chlorate decomposes to form potassium chloride and oxygen. b. Aqueous solutions of copper (II) nitrate and sodium hydroxide react to form solid copper (II) hydroxide and a solution of sodium nitrate. b. Aqueous solutions of copper (II) nitrate and sodium hydroxide react to form solid copper (II) hydroxide and a solution of sodium nitrate. c. Diphosphorous tetrabromide reacts with fluorine gas to produce diphosphorous tetrafluoride...
1. A solid substance has a mass of 250.00g. It is cooled by 25.00°C and loses...
1. A solid substance has a mass of 250.00g. It is cooled by 25.00°C and loses 4.937kJ of heat. What is the specific heat capacity of the substance in ? [APP 2 marks] 2. The combustion of hydrogen sulfide, H2S can be represented by the following balanced equation: 2H2S(g) + 302(g) → 2802(g) + 2H200) Show how the following equations can be combined using Hess's Law and determine the enthalpy of combustion of hydrogen sulfide. [APP 3 marks] Ss) +...
3) The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting that is conversion of ZnS to ZnO by heating: 2ZNS(s)+ 302[g)2ZnO(s) + 2S02(g) AH--879 KJ/mol Calculate the heat evolved (in KJ) per gram of ZnS roasted. (3 points) 4) Given the thermochemical equations: (3 points) AHO-188 KJ/mol AH-768 KJ/mol Br2)+ F2g) 2BrF(g) Br2)+3F2(g) 2BrF3(g) Calculate the AHm for the reaction BrF(g)+ F2(g) BrF3(g)
Determine the enthalpy change for CS20 + 302(g) + CO2(g) + 2SO2(g); AH= ? using the following three thermochemical equations, which will be referred to as reactions (A), (B), and (C). (A) 2C(s) + 202(g) 2002(g); AH= -787.0 kJ (B) C(s) + 25(s) → CS2(); AH= 87.9 kJ (C) SO2(g) → S(s) + O2(g); AH= 296.8 kJ 1. The enthalpy change for the unknown reaction is 2. Describe the action performed on each thermochemical reaction. Reaction (A) was Reaction (B)...
Review Problem 6.086 Given the following thermochemical equations, 2Cu + S(s) - Cu2S(s) AH° = -79.5 kJ S(s) + O2(g) → SO2(9) AH = -297 kJ Cu2S(s) + 202(g) → 2CụO(s) + SO2(g) AH° = -527.5 kJ calculate the standard enthalpy of formation (in kilojoules per mole) of Cuo(s). AH°(Cuo(s)) - kJ/mol The number of significant digits is set to 3; the tolerance is +/-2% Show Work is REQUIRED for this question: Open Show Work Review Problem 6.087 Given the...
Write balanced chemical equations for each reaction described below. 1. Synthesis Reactions a) Dipbosborous trioxide is formed by direct combination of its elements 4P (s)+302(g) → P203 (e) b) Magnesium oxide and carbon dioxide combine to form magnesium carbonate Mgo (s) + CO2(g) → Mg (CO3) (s) 2. Decomposition Reactions a) Potassium chlorate decomposes into potassium chloride and oxygen gas 2KClO3 (ag) → 2 KClO2 lag) + 3 02 (g) b) Calcium sulfate decomposes into calcium oxide and sulfur trioxide...
REPORT SHEET Chemical Reactions and Equations A. Magnesium and Oxygen Sier 1. Initial appearance of Mg ranane 2. Evidence of chemical reaction MgO(s) O2(g) Mg(s)+ 3. Balance: 4. Type of chemical reaction: B. Zinc and Copper(II) Sulfate Evidence of a Chemical Reaction CuSO4(aq) Zn(s) Appearance Appearance ble Stayed vne Time Siwr pcipitnde 1. initial 2. after 30 min . Cu(s)+ZnSO4 (aq) . Zn(s) +CuSO4 (aq) 3. 4. Type of chemical reaction: ingle dsplaument C.Reactions of Metals and HCI 2. Evidence...
Calculate the standard enthalpy of formation of solid magnesium sulfide (MS) using the following thermochemical information: 2 Mg(s) + O2(9) = 2 M90(s) 3 Mg(s) + 5O2(g) = Mg(s) + 2 Mg(s) SO2(g) = S(s) + O2(9) AH = -1203.4 la AH -1504.6 kJ AH = +296.8 kJ AH = 0
6-8 Using the table below, calculate the AH rxn for each of the following equations. Selected Standard Enthalpies of Formation at 25° C (298K) AH (kJ/mol) (kJ/mol Formula AH 0 Silver 92.3 Agis) AgC(3) 0 1270 218 Formula AH (kJ/mol Formula Calcium Ca(s) CI (9) Ca(s) 635.1 HC (G) Caco (s)-1206.9 Hydrogen Hig) Carbon C(graphite) 0 H (9) C(diamond) 1.9 Nitrogen COL) -1105 N19) CO(g) -393.5 NH,(g CH_(9) 74.9 NO(9) CH,OHI) -238.6 Oxygen HỎNG) 133 O.) CS.) 87.9 O (9)...
Answer both question below. Show all work and chemical equations. 1. Using the information below answer questions a to c. Ca sº = 41.6 J/mol K CaCO3 (s) sº = 91.7 J/mol K AH° = -1207.6 kJ/mol O2 Sº = 205.2 J/mol K Cao (s) S0 = 38.1 J/mol K AH = -634.9 kJ/mol CO2 (g) sº = 213.8 J/mol K AH° = -393.5 kJ/mol AH° O2 = 0 kJ/mol AH° Ca= 0 kJ/mol a) Calculate AS9rxn and AH°rxn for...
B. Write a balanced chemical reaction for the following word equations. (7 points) a. Potassium chlorate decomposes to form potassium chloride and oxygen. b. Aqueous solutions of copper (II) nitrate and sodium hydroxide react to form solid copper (II) hydroxide and a solution of sodium nitrate. b. Aqueous solutions of copper (II) nitrate and sodium hydroxide react to form solid copper (II) hydroxide and a solution of sodium nitrate. c. Diphosphorous tetrabromide reacts with fluorine gas to produce diphosphorous tetrafluoride...
1. A solid substance has a mass of 250.00g. It is cooled by 25.00°C and loses 4.937kJ of heat. What is the specific heat capacity of the substance in ? [APP 2 marks] 2. The combustion of hydrogen sulfide, H2S can be represented by the following balanced equation: 2H2S(g) + 302(g) → 2802(g) + 2H200) Show how the following equations can be combined using Hess's Law and determine the enthalpy of combustion of hydrogen sulfide. [APP 3 marks] Ss) +...
Most questions answered within 3 hours.
-
The rise of online shopping and Amazon, in particular, has
created major dilemmas for large food/CPG...
asked 1 minute ago -
Assuming that the wave speed varies little when sound waves are
traveling through a material that...
asked 2 minutes ago -
Is oxygen difluoride polar or nonpolar?
nonpolar
polar
ionic
none of the above
asked 13 minutes ago -
Starting from rest, a car accelerates at a constant rate of 2.6
m/s2 for a time...
asked 9 minutes ago -
A pharmaceutical company wants to answer the question whether
time for a drug in pill form...
asked 12 minutes ago -
) Assume that in the market for widgets, demand is highly
elastic compared to supply. If...
asked 23 minutes ago -
Why is a personal interview the most important step in the sales
selection process? What are...
asked 33 minutes ago -
In Python rOverlap (x1, y1, w1, h1, x2, y2, w2, h2) A rectangle
is axis-aligned if...
asked 33 minutes ago -
If we observe in a protein solution that DNA is causing a
mixture 260/280 ratio ~0.9,...
asked 43 minutes ago -
Explain the steps involved in making cDNA from mRNA, and how you
would create a cDNA...
asked 44 minutes ago -
A beta (β) particle is described by which of the following?
Select the correct answer below:...
asked 46 minutes ago -
A new machine costs $150,000, lasts 10 years, has an annual
O&M cost of $50,000, and...
asked 50 minutes ago