Pentaborane B5H9(s) burns vigorously in O2 to give B2O3(s) and H2O(l). What is ΔH° for the combustion of 1 mol of B5H9(s)? Delta heats of formation for substances B5H9(s)  +73.2 B2O3  -1273.5 H2O(l) -285.8

Q: Consider the following standard heats of formation: H2O(l) = –286 kJ/mol…

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Q: 2. Calculate A H for 4FE0(s) + 02(g) → 2Fe203 (s) based on the reactions: 6FEO (s) + O2 (g) →2FE3O4…

A: Calculate enthalpy of the reaction, 4FeO + O2 -----> 2Fe2O3  ∆Hrxn = ?

Q: 14. Given the following equations and AH° values given below, determine the heat of reaction at 298…

A: Given, a) 2H2(g) + O2(g) ➝ 2H2O(l)  ∆H° = -571.6 kJ b) N2O5(g) + H2O(l) ➝ 2HNO3(l) ∆H° = -73.7 kJ c)…

Q: . What is ΔHorxn of NH3 (ΔHof = -46 kJ/mol) + O2 = NO2 (ΔHorxn = 34) + H2O (ΔHorxn = -286)

A: Since you have posted multiple unrelated questions as per guidelines we can answer only one per…

Q: Calculate ΔHrxn of the following reaction: 2 NO (g) + 2 H2 (g)  → N2 (g) + 2 H2O (g)     ΔHrxn  =…

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Q: ( in kilojoules) for the industrial synthesis of chloroform (CHCl3) in a reaction of methane ( CH4)…

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Q: Oxyacetylene torches produce such high temperature that they are often used to weld and cut metal.…

A: Solution A measuring system is associate degree object used for measure, or the method of measure…

Q: Calculate the ΔH for the target reaction below using the three equations listed. Rewrite the three…

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Q: Compound ΔHf° (kJ/mol) CH3OH(l) –238.7 O2(g) 0.00 CO2(g) –393.5 H2O(l) –285.8 How many grams of…

A: Given data  Mass of water (mwater) = 441 g Initial temperature of water (Ti) = 19.5°C Final…

Q: Calculate ΔH∘f (in kilojoules per mole) for benzene, C6H6, from the following data:

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Q: At 298 K, the following heats of reaction are known: S (s) + O2 (g) → SO2 (g) ΔH = −296.1 kJ 2 SO3…

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Q: Using the standard formation enthalpies that follow, calculate the standard enthalpy change for this…

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Q: Given that the reaction of 4 NH3 (g) + 5 O2 (g) 4 NO (g) + 3 H2O (g) AH = - 906 kJ What would AH for…

A: The correct option with explanation is provided in the next step:

Q: 2C(s, graphite) + 3H2(g) → C2H6(8) ΔΗΧΠ =? Given: (1) C(s, graphite) + 02 (8) → CO2(8) (2) H2 (8) +…

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Q: Calculate the value of ΔGo in kJ for the combustion of 1 mole of methane to form carbon dioxide and…

A: Thermodynamics is branch of chemistry in which deals with the amount of heat evolved or absorbed by…

Q: 15. For the reaction below, DH = -1516kJ at 25°C and DS = -432.8J. This reaction is…

A: Given ,  ∆H = -1516 kJ /mol ∆S = -432.8 J/K.mol    T = 25°C

Q: Q< K the reaction goes to the right (toward products) the reaction goes to the left (toward…

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Q: If AH°, of H,0L is -285.8 KJ/mol and AH° of H,O the AH°, of evaporation of H,O in ( KJ/mol) iİs : is…

A: Since you have posted multiple unrelated questions, we are entitled to answer the first only. Given:…

Q: 0.0500 M HF (Ka= 7.20 x 10–4)  determine the equilibrium molar concentration of H3O+ and…

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Q: Calculate ΔH for the following reaction: PCl3 (l) +  Cl2 (g)  → PCl5 (s) given the following: 1)…

A: Reverse of first reaction and and it will second equation and divide by 2 equation so we can that…

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

A: Enthalpy of reaction is determined by substracting total enthalpy of formation of reactants from…

Q: Suppose that 15M of Naci solution with a volume of 15L is heated and loses 2000ml of water content.…

A: 1) In the process of heating the amount of moles remains same .  Number of moles are given by =…

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

A: Sodium peroxide reacts with water to form sodium hydroxide and oxygen. The equation for the balanced…

Q: Combustion of glucose (C6H₁2O6) is the main source of energy for animal cells: C6H₁2O6(s) + 60₂(g) →…

A: We have to calculate the moles of protein assembled

Q: Use the data below to calculate ΔHº for the reaction N2O4(g) + 3CO(g)  ➜  N2O(g) + 3CO2(g) Compound…

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Q: 1. From the following enthalpy changes, S (s) + 3/2 O₂ (g) → SO3(g) 2 SO₂ (g) + O₂(g) → 2 SO3 (g)…

A: Hess's law states that if a process can be expressed as the sum of two or more steps, the enthalpy…

Q: Given the following information: Bond C-H C-S S-H S=S Bond energy (kJ/mol) 414 259 347 452 Enthalpy…

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Q: Calculate ΔH for the reaction 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (l)

A: ∆H = ∆H1 + ∆H2 + ∆H3 Target equation:-   4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (l) ∆H = ?

Q: It has been experimentally determined that the heat of combustion of benzene at constant volume is:…

A: Interpretation- We have to justify that system perform work towards the surroundings or is work done…

Q: It has been experimentally determined that the heat of combustion of benzene at constant volume is:…

A: The heat of combustion of benzene at constant volume is given to be -3265.6 kJ while the heat of…

Q: Given the data below, H°, for the reaction rxn 2SO2 (g) + O2 (g) → 2SO3 (g) is kJ. AH°; (SO2 (g)) =…

A: O2(g) is pure gas at room temperature so it's ∆H°formation is Zero. So we not need value of O2

Q: Given the following thermochemical data at 25°C and 1 atm pressure, 3/2 02(g) + 2B(s) = -1264 kJ; -…

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Q: Compound ΔHf° (kJ/mol) CH3OH(l) –238.7 O2(g) 0.00 CO2(g) –393.5 H2O(l) –285.8 How many grams of…

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Q: Calculate AH° for the combustion of methane. CH4 (g) + 2 02 (g) →CO2 (g) + 2 H2O (g) Given the…

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Q: Combustion of glucose (C6H₁206) is the main source of energy for animal cells: C6H₁206 (s) + 60₂(g)…

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Q: Syngas can be burned directly or converted to methanol. Calculate AH° for the reaction CO(g) + 2H2…

A: The standard enthalpy of formation is the enthalpy change of reaction in standard conditions when…

Q: Calculate AH°298, AS 298, and AG 298 for the combustion of 1 mole of nonane, C9H20 (MW 128.2 g/mol).…

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Q: Calculate the enthalpy change for the reaction  P4O61s2+ 2 O21g2 ¡ P4O101s2  given the following…

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Q: The value of AH° for the reaction below is - 790 kJ. The enthalpy change accompanying the reaction…

A: Given: ∆Ho=-790 kJ Mass of S = 0.95 g Known: Molar mass of S = 32 g/mol

Q: Calculate the standard free energy change for the reaction below. N2(g) + 3H2(g) → 2NH3(g) given…

A: N2(g) + 3H2(g) -----&gt; 2NH3(g) Standard free energy change for the reaction (∆G°rxn) = ?…

Q: Hydrogen

A: ∆H°rxn = [ ∆H°( Product ) ] - [ ∆H°( reactant ) ]  ∆H°rxn = [ ∆H°( H2O2 ) ] - [ ∆H°( H2 ) + ∆H°( O2…

Q: Given the following reactions A (g) +B (g) – 2 C (g) AH = +810.7 kJ 2 C (g) +B (g) → 2 D (g) AH =-…

A: To calculate the enthalpy of desired reaction , we have to use the given reactions. We have to…

Q: 3. Make an energy diagram for the heat formation of one mole of each of the following substances: a.…

A: The objective is to illustrate the reaction coordinate diagrams for the provided reactions.Reaction…

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Hg(l)+O2(g) 2HBO(s) AH°…

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Q: Determine the  ΔH for the reaction below using Bond Energies.…

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Q: Given the standard enthalpy changes for the following two reactions:

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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.