Write an equation for the formation of each compound from its elements in their standard states, and find ΔfH° for each from Appendix IIB: a.NO2(g) b.MgCO3(s) c.C2H4(g) d.CH3OH(l)

Q: Do exothermic or endothermic reactions have a greater tendency to be spontaneous, and why? IUse the…

A: A spontaneous reaction  take place without any external input to the system. It can also be defined…

Q: Liquid water vaporizes spontaneously at 25ºC. What is the sign of ΔSuniv? Decide on the relative…

A: Liquid water vaporizes spontaneously  As entropy of vapour (gas) is more  than liquid  So sign of…

Q: THERMODYNAMICS: Given the following hypothetical thermochemical equations: 2QJ3 (g) + 3Q2X (g) → 4Q2…

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Q: Given the following thermochemical equations: Fe2O3 (s)+ 3 CO (g) --> 2 Fe (s) + 3 CO2 (g)  Delta…

A: We have to solve this question by applying Hess' law. Statement : It states that the change of…

Q: Q2: label the following picture and answer the following questions: 120 100 80 60 40 reaction…

A: A reaction pathway in graphical representation with blanks and 4 related question with blanks, which…

Q: Consider the combustion of butane gas:C₄H₁₀(g) +O₂(g) →4CO₂(g) +5H₂O(g) (a) Predict the signs of…

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Q: Find ΔS° for the formation of CH2Cl2( g) from its gaseous elements in their standard states.…

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Q: THERMODYNAMICS: Given the following hypothetical thermochemical equations: 2QJ3 (g) + 3Q2X (g) →…

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Q: 3.) For each process, determine the sign of AS for the system: (a) decomposition of CaCO3(s) to give…

A: To solve this problem we have to determine the sign of ∆S  for the given system .

Q: Using enthalpies of formation (See the Supplemental Data), calculate ΔH° (in kJ) for the following…

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Q: Use Equations a and b to determine ΔH for the following reaction.2CO(g) + 2NO(g) → 2C O 2 (g) + N 2…

A: The main equation or primary equation can be obtained by inverting equation (b) and then adding it…

Q: Calculate the required value for each reaction. 2H2 + O2→ 2H2O + 286 kJ A) what amount of energy…

A: The given data contains, Number of moles of hydrogen = 450 moles The given reaction is, 2H2 + O2…

Q: Which of the following is a process with a negative AS? H2O(I) → H2(g) CO2(g) → CO2(s) CACO3(s) →…

A: A process with a negative ∆S is -          (b)CO2(g) → CO2(s).          Because we know that…

Q: What do you expect for the sign of ∆S in a chemical reaction in which 2 mol of gaseous reactants are…

A: Entropy is the measure of the randomness in the molecules or atoms. The entropy of gases is more…

Q: Use Hess's Law to calculate the heat of reaction for the following reaction: A + 3B- →3C + 2D AH =…

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Q: s reaction endothermic or exothermic? ts) oinnerdtoxca no tobne Additionally, rewrite the…

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Q: For the reaction at constant pressure?: 2 Mg(s) + 02(g) → 2 Mg0(s) AH = - 1204 kJ How many…

A: Given: 2Mg(s)+O2(g)→2MgO(s)    ∆H=-1204kJ To find: kilojoules of heat are released when 40.3g  of…

Q: When 1.00 g of AgCl is formed by the reaction in a coffee cup calorimeter, the temperature of 20.0 g…

A: Heat absorbed by water can be calculated by using the formula:Q = m.Cp.∆T where, Q = heat absorbed/…

Q: We can generate hydrogen chloride by hating a mixture of sulfuric acid and potassium chloride…

A: An enthalpy of a reaction is the change in enthalpy of products and reactants The formula to…

Q: Calculate ΔSϴ for the reduction of aluminum oxide by hydrogen gas: Al2O3(s) + 3H2(g) → 2Al(s) +…

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Q: Calculate q (kJ) for the conversion of 2.95 grams of solid aluminum oxide into aluminum and oxygen?…

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Q: How much energy is evolved during the formation of 120 g of Fe, according to the reaction below?…

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Q: Given the following hypothetical thermochemical equations:  2QR3 (g) + 2QX (g) → Q2R4 (g) + 2XQR…

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Q: Consider the following reaction at 25 °C: 5 SO₃(g) + 2 NH₃(g) → 2 NO(g) + 5 SO₂(g) + 3 H₂O(g) a)…

A: The standard enthalpy of the reaction is equal to the difference between the enthalpy of product and…

Q: In the late eighteenth century Priestley prepared ammonia by reacting HNO3(g) with hydrogen gas. The…

A: We are given the balanced chemical equation for the preparation of NH3 as follows: HNO3(g) +…

Q: 3- When 10.0 g of C5H12 is burned (combustion with excess oxygen gas) 453 kJ of energy is released.…

A: (a) The combustion of pentane results in the formation of carbon dioxide and water. The equation is…

Q: N2(g)+3H2(g)→2NH3(g) AH°rxn=-92.6 kJ/mol f 2.0 moles of N2 react with 6.0 moles of H2 to form NH3,…

A: Work is calculated by  W= nRT And for ∆U we will use first law of thermodynamics.

Q: For the reactionCH4(g) + 2O2(g)CO2(g) + 2H2O(g)ΔH° = -802.3 kJ and ΔS° = -5.2 J/KThe maximum amount…

A: At a constant temperature and pressure, the maximum work that can be done by the system on the…

Q: Given the following thermochemical equations        2H2(g)          +       O2(g)      →    2H2O(l)…

A: ⊙ Given,            2H2(g)         +     O2         →      2H2O(l),                      ∆H  =…

Q: Predict the sign of ΔSₛᵧₛ for each process: (a) Gasolinevapors mix with air in a car engine. (b) Hot…

A: Entropy is the measure of randomness.∆Ssys is positive, if the randomness increase and negative if…

Q: For the reactionCH4(g) + 2O2(g)CO2(g) + 2H2O(g)H° = -802.3 kJ and S° = -5.2 J/KThe maximum amount of…

A: Given : Change in enthalpy is -802.3 kJ, change in entropy is -5.2 J/K, temperature is 259 K and…

Q: Calculate q (kJ) for the conversion of 2.97 grams of solid aluminum oxide into aluminum and oxygen?…

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Q: N2(g)2NO(g)++O2(g)O2(g)2N2O(g)→→→2NO(g),2NO2(g),2N2(g)+O2(g),ΔH=+180.7kJΔH=−113.1kJΔH=−163.2kJ use…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

Q: A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2…

A: Given :-  2 HgO(s) 2 Hg(l) + O2(g)  Hrxn = 181.6 kJ  To calculate :-  Heat require to decompose 546…

Q: Given the following thermochemical equations, 4B(s) + 30,(g) → 2B,0,(s) AHº= -2543.8 kJ H2 (g) + ½…

A: The given reactions are,                            4 B(s) + 3 O2 (g) ---> 2 B2O3 (s)…

Q: A 251 g piece of lead (SH=0.160 J/g degrees Celsius) with an initial temperature of 90.5 degrees…

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Q: If you have a reaction that occurs in aqueous solution, and raises the temperature of 15.9 g of…

A: As the reaction is exothermic , it liberates heat  which rises the temperature of water so sign of…

Q: What is Hess’s law? Why is it useful?

A: There are many reactions which lead to the formation of same product but the path followed to attain…

Q: Below is the reaction for the evaporation of water: H20 (1) → H20 (g) AH°f H2O (1)= -285.8 kJ/mole;…

A: Reaction for evaporation of waterH2O (l) → H2O (g)∆Hf°[H2O (l)] = - 285.8 kJ/mole∆Hf°[H2O (g)] = -…

Q: Given the following hypothetical thermochemical equations: 2QJ3 (g) + 3Q2X (g) → 4Q2 (g) + 3J2X (l)…

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Q: Given the following thermochemical equations, 4B(s) + 30,(g) → 2B,03(s) AHº= -2543.8 kJ H2 (g) + ½…

A: Decomposition: Chemical decomposition, or chemical breakdown, is the process or effect of…

Q: Strontium carbonate is responsible for the red color in fireworks. It is generated in the reaction…

A: Given;

Q: Consider the combustion of propane, C3H8, the fuel that is commonly used in portable barbeque…

A: Heat of reaction is defined as difference of energy of product  and energy of Reactant. If heat of…

Q: Consider what happens when a sample of the explosive TNT is detonated under atmospheric pressure.…

A: Given information,      A sample of the explosive TNT is detonated under atmospheric pressure

Q: 12. Copper() oxide can be oxidized to copper(II) oxide: Cu20(s) + % O2(g) →2CuO(s) AH ran = - 146.0…

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Q: Phosgene, COCl2, can be formed by the reaction of chloroform, CHCl3(l) with oxygen:  2CHCl3(l) +…

A: Given:  ∆Ho = -353.2 kJ ∆Go = -452.4 kJ T = 25oC

Q: Given the following thermochemical equations, 4B(s) + 30,(g) → 2B,03(s) AHº= -2543.8 kJ H2 (g) + ½…

A: Given: 4Bs+3O2g→2B2O3s ∆H°=-2543.8kJH2g+12O2g→H2O ∆H°=-241.8kJB2H6s+3O2g→B2O3s+3H2Og ∆H°=-2032.9kJ…