2Cr(s) + 6HF(g) -à 2CrF3(s) + 3H2(g) H° = –691.4 kJ/mol 2Cr(s) + 6HCl(g) --à 2CrCl3(s) + 3H2(g) H° = –559.2 kJ/mol calculate H° for the following reaction: CrF3(s) + 3HCl(g) --à CrCl3(s) + 3HF(g)

Q: Consider the following thermochemical reaction: 6 HCl(g) + 2 BCl3(g)-->B2H6(g) + 6Cl2(g) ΔHrxn =…

A: Given :-  6 HCl(g) + 2 BCl3(g)-->B2H6(g) + 6Cl2(g) ΔHrxn = +755.4 kJ  To calculate :-  mass of…

Q: Ethanol (C2H5OH) burns according to the equation C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)          ΔH…

A:

Q: When one mole of calcium carbonate reacts with ammonia, solid calcium cyanamide, CaCN2, and liquid…

A: To solve this problem first we have to write the balanced chemical equation then we will calculate…

Q: The reaction of titanium(IV) chloride with steam produces titanium(IV) oxide and hydrogen chloride…

A:

Q: 4. Titanium reacts with iodine to form titanium(III) iodide: 2 Ti(s) + 3 12(g) -->2 Til(s) AH = -839…

A: Here we are required to find the mass of Ti needed for the reaction.

Q: Zinc metal reacts with HCl according to the balanced equation: Zn + 2HCl à ZnCl2 + H2 When 0.103 g…

A:

Q: Using these reactions, fi nd the standard enthalpy change for the formation of 1 mol Pb0(s) from…

A: Using Hess law, we can calculate the standard enthalpy change.

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

A:

Q: Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and…

A: Enthalpy of reaction (∆ Hrxn): The difference in the enthalpies of reactants and products.

Q: The value of delta H° for the reaction below is -72 kJ. H2 (g) + Br2 (g) -> 2 HBr (g) ____ kJ of…

A: Standard enthalpy of reaction is the enthalpy change associated with a reaction. It is designated by…

Q: A CHM student completing the calorimetry experiment mixes 20.0 mL of 1.10 M HCl (aq) with 20.0 mL of…

A:

Q: Methanol is an organic solvent that can be used as a fuel in some automobiles. 2 CH3OH(l)…

A: Given: volume of methanol (CH3OH) = 15 mL density of methanol = 0.792 g/mL molar mass of methanol =…

Q: The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When…

A: the amount of heat required to raise the temperature by 1 degree of mass 1 gm is known as specific…

Q: A 0.5736 g of unknown substance is burned in a constant – volume bomb calorimeter that has a heat…

A: Given: Mass of substance = 0.5736 g Heat capacity of calorimeter = 1.674 kJ/°C temperature increased…

Q: Given the balanced chemical equation: Fe(s) +2 HCI(aq) FeCl2(aq) + H2(3) AHrxn ?? A sample of 0.93 g…

A: Mass of solution, msoln = 200 g Specific heat of solution, Csoln = 4.184 J/ g ℃ Rise in Temperature,…

Q: A 27.7-g sample of ethylene glycol, a car radiator coolant,loses 688 J of heat. What was the initial…

A: The heat lost (Q) by any ‘m’ mass of a substance is expressed as follows:

Q: When a 3.76 g sample of solid ammonium nitrate dissolves in 60.0 g of water in a Styrofoam-cup…

A: Interpretation-  To determine  ΔH (in kJ/mol NH4NO3) for the solution when 3.76 g sample of solid…

Q: A 27.3 g sample of ethylene glycol, a car radiator coolant, loses 695 J of heat. What was the…

A:

Q: When 4 miles of NH3 (g) react with O2 to form NO(g) and H2O(g) according to the following equation,…

A:

Q: When 4 moles of NH3(g) react with O₂(g) to form NO(g) and H₂O(g) according to the following…

A: Given reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) The amount of energy evolved = 905 kJ We have to…

Q: Manganese reacts with hydrochloric acid to produce manganese(II)(II) chloride and hydrogen gas.…

A: Mass of Mn = 0.625 g Molar mass of Mn = 55 g/mol Mole(n) = 0.625/55 = 0.0114 mol Volume = 100 mL…

Q: A 125-g sample of cold water and a 283-g sample of hot water are mixed in an insulated thermos…

A: Mass of cold water = 125 g Mass of hot water = 283 g Initial temperature of cold water = 3o C…

Q: The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When…

A:

Q: The process of dissolving ammonium nitrate,NH4NO3, in water is an endothermic process. a)what is…

A: Given Mass of ammonium nitrate = 4.40 g Mass of water = 100 g Heat absorbed by NH4NO3 = 3.30*102 J/g…

Q: When one mole of gaseous ethanol, C 2H 5OH, reacts with three moles of gaseous oxygen, two moles of…

A:

Q: Adding 5.00 g of to 140 g of water in a coffee-cup calorimeter (with stirring to dissolve the salt)…

A: The enthalpy change ΔH is the heat of solution (qrxn) per mole of solute (n). i.e.…

Q: The following thermochemical equation is for the reaction of  iron(III) oxide(s) with hydrogen(g) to…

A: The balanced reaction taking place is given as, => Fe2O3 (s) + 3 H2 (g) -------> 2 Fe(s) + 3…

Q: Use the following information to answer the next question. Iron (III) oxide (Fe203) called rust, can…

A:

Q: Given the following thermochemical equation: H2(g) + Br2(l) ⟶⟶ 2HBr(g)            ΔH = -72.4 kJ…

A:

Q: A 222.5 mg sample of sucrose (C12H2½O11) is combusted in a bomb calorimeter. The temperature of the…

A: Mass of C12H22O11 =222.5 mg=0.2225 g Temperature change = 21.94-21.20=0.74 °C Heat capacity of…

Q: Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and…

A: we know that the  enthalpy of  the given reaction  is calculated using  => ΔHrxn = ∑n…

Q: Adding 4.28 g of NH, NO, (s) to 150 g of water in a coffee-cup calorimeter (with stirring to…

A: Given : Mass of water = 150 g Mass of NH4NO3 added = 4.28 g Initial temperature of solution = 18.4…

Q: The overall reaction in commercial heat packs can be represented as the reaction below. 4 Fe(s) + 3…

A:

Q: The thermite reaction in which aluminum metal reacts with iron(III) oxide to produce a spectacular…

A: The reaction is as follows: 2Al(s)+Fe2O3(s)--------->Al2O3(s)+2Fe(l).          ΔH =  -202.9 kcal.…

Q: The following thermochemical equation is for the reaction of sodium(s) with water(l) to form sodium…

A: The balanced reaction taking place is given as, => 2 Na (s) + 2 H2O (l) --------> 2 NaOH (aq)…

Q: Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the reaction: (1) CH4…

A:

Q: The work done by a system is 8 J, when 40 J heat is supplied to it. What is the

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: When 2 moles of C2H6(g) react with O2(g) to form CO2(g) and H2O(g) according to the following…

A: Given : Amount of heat evolved in the reaction = 2.86 X 103 KJ And moles of C2H6 reacted = 2 moles

Q: Given the balanced equation below for the highly exothermic reaction of aluminum with oxygen to form…

A: Given balanced chemical equation is -

Q: When 1.50 g of Ba(s) is added to 100.00 mL of water in a "coffee cup" calorimeter, the reaction…

A: we have to calculate the value of ∆H

Q: The reaction of carbon(s) with oxygen (g) to form carbon dioxide(g) proceeds as follows:…

A: In this question, we will determine the change in enthalpy ∆H for the given chemical equation.  You…

Q: Methanol is an ingredient in windshield washer fluid and ingesting as little as 4 mL can cause…

A: Carbon monoxide and hydrogen react to form methanol, the balanced chemical equation is given below:…

Q: When a 1.50g sample of solid sodium hydroxide dissolves in 60.0g of water in a coffe cup…

A:

Q: O THERMOCHEMISTRY Using Hess's Law to calculate net reaction enthalpy Lindsay Dimethyl ether, a…

A: Applying concept of Hess law.

Q: 9.53 Using these reactions, find the standard enthalpy change for the formation of 1 mol of PbO(s)…

A: From the given two reactions, firstly we have to find out the reaction of synthesis of PbO. From…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A:

Q: 6.81 Compounds with carbon-carbon double bonds, such as ethylene, C,H4, add hydrogen in a reaction…

A:

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A: The heat of dissolution of MgCl2=heat absorbed by calorimeter+Heat absorbed by the solution.…

Q: (a) When a 4.25-g sample of solid ammonium nitrate dissolvesin 60.0 g of water in a coffee-cup…

A: