The molar enthalpy of combustion of acetylene (C₂H₂) gas in oxygen is given below, in the following chemical equation. What is the total enthalpy change in kJ resulting from the complete combustion of 5.313 g C₂H₂ (acetylene)? 2 C₂H₂(g) + 5 O₂(g) – ΔΗ = -1299 4 CO₂(g) + 2 H₂O(g) kJ

Q: Calculate the enthalpy of combustion (kJ/mol) of cetane (C₁₆H₃₄), an analogous component in diesel…

A: Standard enthalpy of formation:CO₂(g) = -393.5 kJ/molH₂O(l) = -285.8 kJ/molC₁₆H₃₄(s) = -458.3 kJ/mol

Q: Given the following equation...      3Al(s) + 3NH4ClO4(g)  →  Al2O3(s) + AlCl3(s) + 3NO(g) +…

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Q: The thermochemical equation for the combustion of butane is shown below. 2 C 4H 10(g) + 13 O 2(g)…

A: Enthalpy change is a state function. The change in enthalpy of a chemical reaction depends on the…

Q: Use the following calorimetrically determined enthalpy changes to predict the standard enthalpy…

A: Enthalpy of the reaction is the amount of energy released or absorbed by a reaction.  If the energy…

Q: Nitromethane (CH3NO2) burns in air to produce significant amounts of heat.…

A: Molar mass of nitromethane = 61.04 g/mol

Q: their enthalpy changes,                         N2 (g)   +   O2 (g)    -->    2 NO (g)…

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Q: The balanced thermochemical equation for the combustion of exactly one mole of propane is: C3H8 (g)…

A: 1.5 CO2 (g) + 5 H2O(l)   → 0.5 C3H8 (g) + 2.5 O2 (g) )                  ΔH =+1110 kJ/mol

Q: Octane (C8H18) undergoes combustion according to the following thermochemical equation.…

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Q: The enthalpy of combustion of acetylene (C2H2) is described by C2H2(g) + (5/2)O2(g) → 2CO2(g) +…

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Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the…

A: Given: (1) N2(g) + O2(g) → 2NO(g); ΔHrxn = -43.1 kcal mol-1  (2) N2(g) + 3H2(g) → 2NH3(g); ΔHrxn =…

Q: 1. Calculate the enthalpy for this reaction: 3NO 2 (g) + H 2 O(ℓ) ---> 2HNO 3 (aq) + NO(g) given…

A: Given reactions are : 1). 2NO (g) + O2 (g) -----------> 2NO2 (g),  ΔH1o = ─ 116 kJ2). 2N2 (g) +…

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

A: Let us denote the given reactions by reaction 1,2,3, and 4 from up to down respectively. Now we have…

Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the…

A: Data given: N2 (g) + O2 (g) → 2NO(g), ∆Hr×n = -43.1 kcal mol–1 ------------ (1)  N2 (g) + 3H2 (g) →…

Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the…

A: Required equation: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) N2(g) + O2(g) → 2NO(g) ΔHrxn = -43.1 kcal…

Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 502(g) - 4NO(g) + 6H2O(g), given the…

A: Enthalpy change of a reaction is an extensive property, it depends on stoichiometry of the chemical…

Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the…

A: Hess's law states that the enthalpy change for an overall reaction is the sum of enthalpy changes of…

Q: The standard enthalpies of combustion (ΔH°comb) of C6H6(g) and C2H2(g) are –3301 kJ/mol and –1300…

A: Given combustion reaction; C6H6 (g)  →  3C2H2 (g) ΔH°comb of C6H6 (g) = -3301 KJ/mol ΔH°comb   for…

Q: Use standard enthalpies of formation to determine the change in enthalpy for the combustion of 1…

A: Standard enthalpy change of combustion,  , is the energy released in the reaction  when a substance…

Q: Methanol is known to be the simplest alcohol, and is used as  an antifreeze agent, a solvent, a…

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

A: To determine enthalpy of reaction , enthalpy of formation is required.  Enthalpy of formation is…

Q: A scientist measures the standard enthalpy change for the following reaction to be -34.0 kJ: C₂H4…

A: ΔH° = -34.0 kJ ΔH°f (CH3CH2OH) = -235.1 kJ/mol ΔH°f (C2H4) = -52.3 kJ/mol

Q: As an alternative to the combustion of coal gas, coal can undergo a process called methanation:…

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Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the…

A: The given data is as follows: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)          ∆Hr=? N2(g) + O2(g) →…

Q: Calculate the enthalpy of combustion of 1 mol decane, C10H22, (l), to form CO2 and H2O. ∆Hf0 for…

A: During the combustion of one mole of any component/substance the energy amount that gets released in…

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

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Q: Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction:…

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Q: The complete combustion of acetic acid, HC2H3O2(l), to form water, H2O(l), and CO2(g), at constant…

A: Here we have to write balanced thermochemical equation and draw an enthalpy diagram-

Q: What is the enthalpy change for the first reaction? CH4(g) + 1/2O2(g) → CH3OH(g) ΔH =

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Q: What is the enthalpy change when  2.00 mol of oxygen (O2) react? C12H22O11(s)   + 12 O2(g) →    12…

A: Given,C12H22O11(s) + 12 O2(g)    →    12 CO2(g) + 11 H2O(l)        ΔH = -5644 kJThis means that,…

Q: Using the data given, calculate the standard enthalpy of combustion of C₂H₆ in kJ/mol?…

A: H₂(g) + 1/2O₂(g) → H₂O(l) ΔH°= –286 kJ C₂H₄(g) + H₂(g) → C₂H₅(g) ΔH°= –137 kJ C₂H₄(g) + 3O₂(g) →…

Q: What is the enthalpy change when a 50.00 g sample of methane undergoes complete combustion according…

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Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the…

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Q: Calculate the enthalpy of reaction for the combustion of 9.25 g of butane, C4H10, using the…

A: Given data  - Enthalpy of formation - CO2(g) = -394 kJ/mol; H2O(l) = - 286 kJ/mol; C4H10(g) = -484…

Q: Find the standard change in enthalpy for the following reaction. N₂H₂(1) + O₂(g) → 2 NO(g) + 2…

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Q: The balanced thermochemical equation for the combustion of exactly one mole of propane is: C3H8 (g)…

A: Given equation is C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O(l) ΔH = -2220 kJ/mol  Let this be equation…

Q: From the following enthalpies of reaction: 2 H2(g) + O2(g) → 2 H2O(l)…

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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.