11. 2Cr2O3(s) → 4Cr(s) + 302(g) AH° = +2269.4kJ (a) What is the heat of formation of chromium (III) oxide? Ans. -1134.7 kJ (b) What is AH° for the formation of 13.65 g of chromium (III) oxide? Ans. -101.9kJ

Q: 3) The compound carbon suboxide, CO, is a gas at room temperature. Use the data supplied to…

A:

Q: The complete combustion of solid naphthalene into CO2(g) and H2O(l) at 25 °C produces 5154 kJ/mol of…

A: Given here the complete combustion of solid naphthalene into CO2(g)and H2O(l) at 25 °C produces 5154…

Q: Automobiles and trucks pollute the air with NO. At 2000.0°C, Kc for the reaction is 4.62  × 10–4,…

A: Solution- van't Hoff equation:  InK2K1= -AHRx 1T2-1T1K1 = 4.62 x 10-4, K2 = ? T1 = 2000oC= 2273.15…

Q: If the following enthalpies are known: A+ 2 B- +2C + Donding AH = - 95KJ B+X C AH = + 50kJ %3D What…

A: According to Hess's law change of enthalpy in a chemical reaction is same regardless of whether the…

Q: tWo steps in thể usual industrial preparation of acrylic acid, the immediate precursor of several…

A: The question is based on Hess law. it  states that net enthalpy change for the reaction remains same…

Q: 9. A hot air balloon has a volume of 3.21 x 10° L. It is filled with CO, and H,O gas when propane is…

A: “Since you have asked multiple questions with multiple sub parts, we will solve the first question…

Q: A hot air balloon is being inflated to its full extent by heating the air inside it. In the final…

A: Delta E for the process = 790 kJ

Q: 4. When 1.50 g of Ba(s) is added to 100.00 g of water in a container open to the atmosphere, the…

A: NOTE : Since you've posted multiple questions, we'll solve first question for you. If you want any…

Q: 1. Calculate the AH for the reaction 2S + 20F 2(g) SO + SF 4(g) (), using the following…

A: As per our company guidelines, we are supposed to answer only one question. Kindly repost the second…

Q: When 13.8 mL of 0.870 M lead(I) nitrate reacts with 90.0 mL of 0.777 M sodium chloride, 0.579 kJ of…

A: Number of moles = Molarity x Volume (L)

Q: Liquid hydrogen peroxide releases oxygen gas in its decomposition. 2 H202 - 2 H20 + O2 AH rxn =…

A:

Q: The white pigment TiO2 is prepared by the reaction of titanium tetrachloride, TiCl4, with water…

A:

Q: Consider the following reaction: 2Mg(s) + 02(g) → 2M90 AH = -1204kJ How many kilojoules of heat are…

A: 1- First we will calculate the  moles of MgO(s)  moles = [ mass / molar mass ]  moles = [ 7.50g /…

Q: Elemental iron is used in heat packs and the reaction can be represented as: 4 Fe(s) +3 O2(g) → 2…

A: When enthalpy is negative that means reaction is exothermic reaction

Q: Given the following thermochemical equation: CaCOa(s) → CaO(s) +CO2 (g) AH=177.8 kJ/mol What is the…

A: According to the first law of thermodynamics, the total heat change of a system at constant pressure…

Q: A 30.5-g sample of an alloy at 93.0oC is placed into 50.0 g of water at 22.0oC in an insulated…

A: Given that, Mass of alloy, Malloy = 30.5 g = 0.0305 Kg Initial temperature of alloy, Tinitial-alloy…

Q: 11. Given the thermochemical equations, calculate the heat of reaction at 298 K for the reaction of…

A:

Q: The following thermochemical equation is for the reaction of tetraphosphorus decaoxide(s) with…

A:

Q: The following thermochemical equation is for the reaction of tetraphosphorus decaoxide(s) with…

A: 1 mol of tetraphosphorus decaoxide (P4O10) has produced energy = 453 kJ  Molecular weight of…

Q: When 13.8 mL of 0.870 M lead(1I) nitrate reacts with 90.0 mL of 0.777 M sodium chloride, 0.579 kJ of…

A: The balanced reaction taking place is given as, => Pb(NO3)2 (aq) + 2 NaCl (aq) ----> PbCl2 (s)…

Q: Which of the following (with specific heat capacity provided) would show the smallest temperature…

A:

Q: 1. Benzene is toxic to humans, and is highly flammable as well. Calculate the amount of heat…

A:

Q: The heat of combustion of ethanol is -1367 KJ/mol, a batch of sauvignon Blanc wine contains 10.6%…

A: GivenThe heat of combustion of ethanol is —1367 kJ/mol.The mass percent of ethanol in the wine is…

Q: A solution of AgNO3 (100.0 mL, 0.300 M) reacts with a solution of HCI (100.0 mL. 0.300 M) in a…

A: Given that : The volume of AgNO3=100.0 mLThe molarity of AgNO3=0.300 MThe volume of HCl=100.0 mLThe…

Q: 1. Benzene is toxic to humans, and is highly flammable as well. Calculate the amount of heat…

A: Given reaction; 2C6H6+15O2→12CO2+6H2O   ;∆Ho=-98.0kJ

Q: Consider the following balanced thermochemical equation for the decomposition of the mineral…

A: Thermochemical equation :-  A chemical equation in which heat changes involved during the reaction…

Q: 15.5a of an nknown. metal at 8l6.30°C .5 placed.in 50a at 7.60°C, The waters temparature is measured…

A: Given mass of unknown metal = 15.5 g Initial temperature of metal = Ti = 86.30 0C Final temperature…

Q: Deterioration of buildings, bridges, and other structuresthrough the rusting of iron costs millions…

A: In a balanced equation, the number of atoms on both sides of the equation should be the same. This…

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A: The amount of heat absorbed or released is related to specific heat capacity as,…

Q: CaC2.  Given the thermochemical equations below, calculate the ΔHfo for acetylene in kJ/rxn.…

A: We have given that ., CaO(s) + H2O(l) --->  Ca(OH)2(s)                                 ΔH = -…

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A:

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A:

Q: The value of AH° for the reaction below is -126 kJ. The amount of heat that is released by the…

A: Balanced equation:2 Na2O2 + 2 H2O ===> 4 NaOH + O2 Reaction type: double replacement.

Q: Limestone stalactites and stalagmites are formed in caves bythe following reaction:Ca2+ (aq) + 2…

A: The chemical reaction is as follows:

Q: The value of ΔHcomb for dimethylphthalate (C10H10O4) is 4685 kJ/mol. How much heat was released…

A: we need to calculate the heat was released during the combustion of dimethylphthalate. the formula…

Q: Nitrogen oxide (NO) has been found to be a key component in many biological processes. It also can…

A: The given is reaction for formation of NO2 NO(g) + ½O2(g) → NO2(g) ΔH = –57.0 kJ We are to find out…

Q: When 13.8 mL of 0.870 M lead(II) nitrate reacts with 90.0 mL of 0.777 M sodium chloride, 0.279 kJ of…

A: Answer - The correct option is - (c) 23.3 kJ

Q: Combustion of 7.21 g of liquid benzene (C6H6, Mm= 78.12 g.mol-) causes a temperature rise of 50.3°C…

A: Given: The mass of the liquid benzene is 7.21 g The molar mass of benzene is 78.12 g.mol-1 The…

Q: Given the following thermochemical equation: CACO3(s) → CaO(s) +CO2 (g) AH=177.8 kJ/mol What is the…

A: In this problem internal energy to be calculate.

Q: How many KJ of energy are released when 6.39 g of Fe reacts with excess O₂? Given the following…

A:

Q: Determine the heat of reaction for the decomposition of calcium carbonate CaCO3(g) → CaO(s) + CO2(g)…

A: Determine the heat of reaction for the decomposition of calcium carbonate CaCO3(s) → CaO(s) + CO2(g)…

Q: The vaporization of Br2 from the liquid to the gas state equires 7.4 kcal/mol (31.0 kJ/mol). a) What…

A: In this question, first we will discuss about sign of ∆H ( Change in Enthalpy ) for this…

Q: Given the following thermochemical equation: CaCO3(s) → CaO(s) +CO2 (g) AH=177.8 kJ/mol What is the…

A: Given: ∆H for the reaction = 177.8 kJ External pressure = 12.3 atm Initial volume = 2.0 L Final…

Q: 5. A piece of copper metal of mass 6.5 kg is heated from 20.5ºC to 324.3°C. Calculate the heat…

A: The amount of heat absorbed by the piece of metal can be calculated as follows:

Q: The value of AH° for the reaction below is -336 kJ. Calculate the heat (kJ) released to the…

A: We have a reaction,  CH4 + 3Cl2   →  CHCl3 + 3HCl ,   ΔH = –336kJ we need to find heat released when…

Q: 100. mL sample of 0.200M aq HCl acid is added to 100mLof 0.200M aq ammonia in a calorimeter.whose…

A: Given that, Volume of 0.2 M HCl solution = 200 mL = 0.2 L Moles of HCl in the solution nHCl = 0.04…

Q: 5. The combustion of methanol CH,OH is given by the reaction 4CO+ 8H,O 4CH,OH + O Determine a. Heat…

A: NOTE: Note : please note Thermodynamic value was not provided in the question.  so,  I have used…

Q: 4. When a solution containing 8.00 g of NaOH in 50.0 g of water at 25.0 °C is added to a solution of…

A: Answer :-  3) The reaction will be non spontaneous at all temperature.  4)   ∆H = -50.19 (kJ) or  ∆H…