21. Determine the enthalpy change for the reaction below: 2 XO2 (s) +CO (g) → X2O3 (s) + CO2 (g) ΔΗ-? based on the following reactions: XO2 (s) + CO (g) XO (s) +CO2 (g) X304 (s) + CO (g) 3 XO (s) + CO2 (g) AH=-26.8 kJ AH= + 7.3 kJ 3 X203 (s) + CO (g) 2 X304 (s) + CO2 (g) AH=-10.6 kJ

Q: 3. For which one of the following is the enthalpy of the reaction the same as the enthalpy of…

A: Enthalpy of formation is defined as the heat change during the formation of 1 mole of a substance…

Q: Hot packs can be made from calcium chloride by mixing/reacting it with water (reaction shown below).…

A: A numerical problem based on enthalpy change of reaction, which is to be accomplished.

Q: Find the molar enthalpy in kJ per mol of H2 of the reaction: H2(g) + Cl2(g) → 2 HCl(g) given that…

A: Given reaction; H2(g) + Cl2(g) → 2 HCl(g) Given amount of water m = 481 g Heat capacity of water c =…

Q: Calculate the change of enthalpy for the reaction CH4 (g) + NH3 (g) --> HCN (g) +3H2 (g) from the…

A: Answer:- this question is answered by using the simple concept of Hess law of constant summation of…

Q: A scientist measures the standard enthalpy change for the following reaction to be -1142.2 kJ:…

A: Standard enthalpy of formation of H2S (g) = -20.1 kJ/molStandard enthalpy of formation of O2 (g) = 0…

Q: 9. Calcium oxide, CaO(s), reacts with carbon as shown. CaO(s) + 3C(s) + 462.3 kJ → CaC2(s) + CO(g)…

A: Calcium oxide, CaO(s), reacts with carbon to form calcium carbide and carbon monoxide. The balanced…

Q: For which one of the following is the enthalpy of the reaction the same as the enthalpy of…

A: Enthalpy of fornation :-  The enthalpy change involved in the formation of 1 mole of a compound from…

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: Fe,O3(s), with carbon monoxide, CO(g), as shown in the balanced equation below: Fe,O3(s) + 3CO(g) →…

A: given (1) CO(g) + 1/2O2(g) → CO2(g)                       ΔH° = -283 kJ (2) 2Fe(s) + 3/2O2 (g) →…

Q: Using the standard enthalpies of formation, what is the standard enthalpy of reaction? CO(g) +…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be -132.2 kJ :…

A: Given chemical reaction is  4HCl(g) + O2(g) ---> 2H2O(g) + 2 Cl2(g) Standard Enthalpy change of…

Q: (1) N2(g) + 202(g)→2NO2(g) AH° = 66.4 kJ (2) 2N½0(g)2N2(g) + O2(g) AH° = -164.2 kJ what is the…

A: Given, N2(g)+2O2(g)→2NO2(g) ∆Ho=66.4kJ--------(1)2N2O(g)→2N2(g)+O2(g) ∆Ho=-164.2kJ--------(2)

Q: 4. The combustion of 1.00 mol of liquid octane (C,H13), a component of gasoline, at constant…

A: Given,  Burning of octane then heat release, q = 5.46 x 103 KJ Find,  Enthalpy change for burning 50…

Q: Calculate the change of enthalpy for the reaction CH4 (g) + NH3 (g) --> HCN (g) +3H2 (g) from the…

A: Calculate the change of enthalpy for the reaction CH4 (g) + NH3 (g) → HCN (g) +3H2 (g) from the…

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A:

Q: When 0.5200.520 g of sodium metal is added to an excess of hydrochloric acid, 54105410 J of heat are…

A: First find the no. of moles in 0.520 g of Na.  then apply unitary method.

Q: Ammonia burns in the presence of a copper catalyst to form nitrogen gas. 4NH3 (g) + 302(g) → 2N2 (g)…

A:

Q: Calculate the enthalpy of formation, ∆Hof, for C4H9OH using the following data:   C4H9OH (l)   +…

A: Given;

Q: The enthalpy change for the following reaction is -483.6 kJ: 2H2(g) + O2(g) ---> 2H2O(g) Therefore,…

A: The reaction given is  1) 2 H2 (g) + O2 (g) ----------> 2 H2O (g)…

Q: Sand is converted to pure silicon in a three step process. The third step is   SiCl4(g) + 2Mg(s) →…

A: Given:SiCl4(g)  + 2Mg(s) → 2MgCl(s)  + Si(s)        ΔH  = –625.6 kJ

Q: Nitroglycerin is a powerful explosive that forms different gases when detonated. Calculate the…

A: Given: Enthalpy change of detonated = -364 kJ/mol Mass of nitroglycine detonated = 10.0 g Known:…

Q: 2. The major source of aluminium in the world is bauxite (mostly aluminium oxide). The thermal…

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

Q: Use standard enthalpies of formation to calculate AH for the following reaction. 2NaHCO3 (s)→Na20(s)…

A:

Q: Image attached

A: Consider the desired equation is as follows: 2NO2g→N2O4g Consider the given reactions as follows:…

Q: For which one of the following is the enthalpy of the reaction the same as the enthalpy of…

A: The standard enthalpy of formation is defined as the enthalpy change accompanying the formation of 1…

Q: 20.) Industrial production of methanol uses a synthesis gas which is a mixture of carbon monoxide…

A: This problem is based on Hess's law Hess's law states that the enthalpy change or heat evolved or…

Q: Using standard heats of formation, calculate the standard enthalpy change for the following…

A: Given;  Note: for standard enthalpy of formation, values are taken from the standard books.

Q: Rewrite the overall equation of the reactant in Part II(Q4). Using this as your starting point,…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be -129.8 kJ :…

A: The given chemical reaction is as follows 4HCl(g) + O2(g)------->2H2O(g) + 2 Cl2(g)

Q: Given the following thermochemical equation: 4NH3(g) + 502(g) Calculate the enthalpy change when…

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Q: During volcanic eruptions, hydrogen sulfide gas is given off and oxidized by air according to the…

A:

Q: Hydrazine, N2 H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the…

A:

Q: The complete combustion of propane in oxygen is represented by the equation C3H8(g) + 5O2(g) →…

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Q: Given the following data: Na(g) + O2(g) O2(g) 2N20(g) → 2NO(g), AH = +180.7 kJ AH =-113.1 kJ 2NO(g)…

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Q: Find the molar enthalpy in kJ per mol of H2 of the reaction: H2(g) + Cl2(g) → 2 HCl(g) given that…

A:

Q: Ba(OH)2 8H20(s) + 2NH4NO3(aq) → calorimeter containing 200.0 mL of 0.01 M NH4NO3, changing the…

A: 1.) To calculate the Enthalpy change of reaction , formula used is : ∆Hrxn = - q / n  where , q =…

Q: Calculate the change of enthalpy for the reaction CH4 (g) + NH3 (g) --> HCN (g) +3H2 (g) from the…

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Q: In which of the reactions below is ÄH (enthalpy change) not an enthalpy of formation? O a. Mg(s) +…

A: The standard enthalpy change of formation is equal to the sum of the standard enthalpies of…

Q: The standard enthalpy changes for the combustion of carbon and carbon monoxide are shown below. C(s)…

A:

Q: Hydrazine, N3H4, is a colorless liquid used as a rocket fuel. What is the enthalpy change for the…

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Q: Hydrogen peroxide, H2O2, is a colorless liquid whose solutions are used as a bleach and an…

A:

Q: When 1.16E-1 g of Zn(s) combines with 5.21E1 mL of HCl(aq) in a coffee cup calorimeter, all of the…

A: Here we are required to find the enthalpy change of the displacement reaction between zinc and HCl

Q: 6 & 7. Consider the following reaction: 2 CH,OH (g) → 2 CH(9) + O2 (g), AH = + 252.8 kJ a) Is this…

A:

Q: Calculate the enthalpy of the net reaction from the reactions given. 1) H2(g) + Cl½(g) → 2HCI(g) AH,…

A:

Q: D 8. Calculate the enthalpy change for the following reaction given the information below.…

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

Q: Using the standard enthalpies of formation, what is the standard enthalpy of reaction? CO(g) + H,…

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Q: For the reaction H2(g) + 1 2O2(g) --> H2O(l)        ΔH = -286 kJ/mol    Calculate the enthalpy…

A:

Q: Calculate the enthalpy of the following chemical reaction: CS2(1) + 302(g) ---> CO2(g) + 2SO2(g)…

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Q: If the reaction 2 H2(g) + O2(g) yields 2 H2O(l) is multiplied by 2 and the given enthalpy change is…

A:

Q: Acetic acid, CH3COOH, is contained in vinegar.  Suppose acetic acid was formed from its elements,…

A: The given Reactions and data are- 1. CH3COOH(l) + 2 O2(g) -> 2 CO2(g) + 2 H2O(l)   ,   ∆H° = -871…

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.