Substance AH, AgCl AgCN HCl -129.888 kJ/mol 141.8 kJ/mol -171.728 kJ/mol HCN 108.5 kJ/mol HCl + AgCN → HCN + AgCl Use the formula to figure out if this reaction endothermic or exothermic? ΔΗrχη-ΣΔΗ products -ΣΔΗ reactants %3D endothermic exothermic not enough information to tell neither

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: The standard enthalpy change for the following reaction is -822 kJ at 298 K.2 Na(s) + Cl2(g)    2…

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Q: The equations given in the problem introduction can be added together to give the following…

A: Reaction 1 has to be reversed.

Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: In an exothermic reaction, heat is released, and in an endothermic reaction, heat is absorbed.

Q: A 8.17 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Guideline message: In case of multiple subparts, ideally the first 3 subparts should be answered, if…

Q: 4. Consider the following equations: 4 PCI; 1. P₁ + 6 Cl₂ → P₁ +50₂ → 2. P₂010 AH₁ = -1226 kJ AH₂ =…

A: Given, Enthalpy change for the few reactions are given, 1) P4 + 6Cl2  ➝ 4PCl3 ∆H1 = -1226 kJ 2) P4 +…

Q: Solid potassium chloride dissolves in water according to the equation below. KCl (s) ⟶ K+ (aq) +…

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Q: CH3OH (l) + 3/2 O2 (g) → CO2 (g)  + 2 H2O (l), ΔH = -726.4 KJ/mol C (graphite) + O2 (g)  → CO2 (g),…

A: Given reactions are  1) CH3OH (l) + 3/2 O2 (g) → CO2 (g)  + 2 H2O (l),…

Q: 1) Given C(s) + O2 (g) → CO2 (g) ΔH= +393.5 kJ S(s) + O2 (g) → SO2 (g) ΔH= +296.8 kJ What will be…

A: Given data 1) GivenC(s) + O2 (g) → CO2 (g) ΔH= +393.5 kJS(s) + O2 (g) → SO2 (g) ΔH= +296.8 kJWhat…

Q: Calculate ΔH (in kJ/mol) for the reaction shown below: ClF(g)+F2(g)→ClF3(g) Use the following…

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Q: When a 3.00-g sample of liquid octane (Cg H18) burns in a bomb calorimeter, the temperature of the…

A: The amount of heat released in the combustion of 3 g liquid octane gets absorbed by the calorimeter.…

Q: For the chemical reaction H₂ (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol. What is the molar enthalpy…

A: In the given question, molar enthalpy of a reaction is given as :-  H2(g) + F2(g) -----> 2HF(g)…

Q: Determine the enthalpy of reaction for HCI(g) + NANO2(s) → HNO2(1) + NaCI(s) 2NACI(s) + H2O(1) →…

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Q: Calculate AH for the reaction NH3 (g) + CH4 (g) → HCN (g) + 3 H2 (g), from the following data. N2…

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Q: A calorimeter contains 16.0 mL of water at 14.5 °C. When 2.20 g of X (a substance with molar mass of…

A: Given :  Mass of X = 2.20 g  Volume of water = 16.0 mL  Heat capacity (C) = 4.18  ∆T = 25.5 - 14.5 =…

Q: Which of the following reactions is exothermic? ¹/2 N₂(g) + ¹/2O₂(g) + 90.7 kJ ® NO(g) CO(g) + 111…

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Q: Which of the following represents an endothermic reaction? CH4 (g) + 202 (g) → CO2 (g) + 2H2O (g) +…

A: An endothermic reaction is a chemical reaction where the reactants absorb heat from surrounding and…

Q: Calculate Δ­H for the reaction  NO(g) + O(g) → NO2(g) given the following information: NO(g) +…

A: Introduction The value of heat of reaction can be calculated by the application of Hess's Law.

Q: The enthalpy for formation of NH3(g) is -45.9 kJ/mol. What is the reaction enthalpy for the…

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Q: A chemist measures the energy change AH during the following reaction: Cl₂(g) + H₂(g) → 2 HCl(g) Use…

A: An EXOTHERMIC thermochemical reaction equation is written as Reactants ------> products + HeatOr…

Q: An important flavor component of vanilla extract is vanillin (C8H8O3, molar mass = 152.15 g/mol).…

A: Given data is Molar mass of  152.15 g/mol  heat capacity of bomb calorimeter = 14.18 kJ/°C Increase…

Q: A chemist measures the enthalpy change AH during the following reaction: C,H„0g(s)→2C0,(g) +…

A: The enthalpy change for the given reaction is given as follows- C6H12O6 (s) →2 CO2 (g) + 2 C2H5OH…

Q: Determine the ΔH for the reaction: IF5(g) → IF3(g) + F2(g) using the data below.             IF(g)…

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Q: What is the enthalpy change when 47.6 g Al completely react, given the reaction below?   The molar…

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Q: Given the following thermochemical equations: C +;02 → CÓ 99 k.J ΔΗ- тol 294.5 kJ CO + 02 → CO2 ΔΗ=…

A: The initial step to solve this problem is to get the expression for the desired equation from the…

Q: The combustion of hydrogen-oxygen mixtures is used to produce very high temperatures (ca. 2500 °C)…

A: The question is based on the concept of chemical thermodynamics. first, we have to identify what is…

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.