Using the provided table and the equation below, determine the heat of formation for PbS. 2 PbS (s) + 3 O2 (g) → 2 SO2 (g) + 2 PbO (s) AH° = -828.4 kJ/mol Substance AH (kJ/mol) O2 (g) SO2 (g) -296.9 PbO (s) -217.3

Q: Consider the hypothetical thermochemical equation 3 A + B → 2 C for which ΔH = 57.9 kJ/mol. a) If…

A: Number of moles of C produced by 3 mol of A = 2 mol Number of moles of C produced by 1 mol of A =…

Q: Ammonium perchlorate mixed with powdered aluminium powers the space shuttle booster rockets:…

A: Given data: 2 NH4ClO4g + 2 Als → Al2O3s + 2 HClg + 2 NOg + 3 H2Og The heat of formations of the…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCl(aq) 2 MCI, (aq) + 3…

A: We will answer the first question since the exact one wasn't specified. Please submit a new question…

Q: Given the following thermochemical equation for the synthesis of aluminum oxide from aluminum and…

A:

Q: 19, Consider the following information about the combustion of octane (CaHis), the principle…

A: Given,Mass of octane = 1.14 g+ 1000 g =1001.14 gSpecific heat of water = 4.184 J/go CΔH = -1080 kJ

Q: The thermite reaction, in which powdered aluminum reacts with iron oxide and yields aluminum oxide…

A: Thermite reaction is the reaction between a metal and a metal oxide. In this reaction, the metal…

Q: Consider the hypothetical thermochemical equation 3 A + B → 2 C for which ΔH = 65.5 kJ/mol. A) If…

A:

Q: The energy content of food is typically determined using a bomb calorimeter. Consider the combustion…

A: Since Q = CΔT  where Q = heat  C = heat capacity = 2.67 kJ/°C ΔT = change in temperature = 26.1 -…

Q: Consider the hypothetical thermochemical equation 3 A + B → 2 C for which ΔH = 63.7 kJ/mol. a.If…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: Duncan knows that it takes 36400 calcal of energy to heat a pint of water from room temperature to…

A: Given: Energy needed to heat a pint of water from room temperature = 36400 Cal Heating 0.900 pint of…

Q: When a  3.21 g  sample of solid sodium hydroxide was dissolved in a calorimeter in 100.0 g of water,…

A: Mass of Water = 100.0 g. Specific heat of water = 4.184 J/g 0C. Change in temperature, ΔT = 32-23.9…

Q: enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

A: Enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCI(aq) 2 MCI, (aq) + 3…

A:

Q: The heat capacity of platinum (Pt, 195.1 g mol-1), is 26.0 J mol-1 K-1. Calculate the energy needed…

A: Q = n S ∆T  where  m = mass of the given metal = 66.6 g  n = W/M = 66.6 g/ 195.1 g/mol = 0.341 mol…

Q: Consider these reactions, where M represents a generic metal. 2 M(s) + 6 HCl(aq) – 2 MC, (aq) + 3 Н,…

A: The reactions given are,

Q: Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen…

A: The first chemical equation is, N2g+3H2g→2NH3g       ∆H=-92 kJ......(1) The second chemical equation…

Q: 6. The work done to compress a gas is 74 J. As a result, 26 J of heat is given off to the…

A:

Q: what mass of HF (in g) must react in order to produce 690 kJ of energy

A:

Q: 78.444 g of hexane combust in a bomb calorimeter. The calorimeter contains 669.56 g of water at…

A: The heat capacity is the ratio of the energy supplied in the form of heat to the rise in the…

Q: 1. How much energy is required to raise the temperature of 37.8 g of silver from 19.2°C to 63.5°C?

A: Solution 1:- In order to be able to determine how much heat is required to increase the temperature…

Q: Magnesium burns in air to produce a bright light and is often used in fireworks displays. The…

A:

Q: Duncan knows that it takes 36400 cal of energy to heat a pint of water from room temperature to…

A: for 1 pint of water energy absorbed = 36400cal 1 cal = 4.184 x 10 -3 kJ  so 36400 cal  = 36400 x…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCI(aq) → 2 MCI, (aq) +…

A: In-order to find the enthalpy change of the desired reaction, the given reactions has to be written.

Q: A bomb calorimetry experiment is performed with xylose, CSH10OS (s), as the combustible substance.…

A: ,given xylose burned=1.823gmheat capacity of calorimetre=4.728KJ/°Cinitial temperature=23.29°Cfinal…

Q: Consider the following thermochemical equation: 2 Mg(s) + O2(g) --> 2 MgO(s) ∆H° = –1204 kJ What…

A: Hess' law: Sum of standard enthalpy of formation of reactant is subtract from Sum of standard…

Q: Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen…

A: We have to calculate the net change in enthalpy for the formation of one mole of nitric acid.

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCI(aq) 2 MCI, (aq) + 3…

A: We need to obtain the equation with the unknown enthalpy change from the equations with the known…

Q: Consider these reactions, where M represents a generic metal. 2 M(s) + 6 HCI(aq) 2 MCI, (aq) +3H,…

A: The enthalpy of the equation  2M(s) + 3Cl2(g) -----> 2MCl3(s) is calculated below.

Q: According to the following thermochemical equation, if 1.902 kg of NO2 is produced, how much heat is…

A: The thermochemical equation given as, => 2 NO (g) + O2 (g) ---> 2 NO2 (g)…

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

A: Enthalpy of reaction , ΔH can be calculated as : ΔH =  Sum of Enthalpy of formation of product - Sum…

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

A:

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCI(aq) → 2 MCI, (aq) +…

A: Consider the given reactions is as follows; 2 Ms  +  6 HCl aq   →   2 MCl3 aq  +  3 H2 g…

Q: Meals-ready-to-eat (MREs) are military meals that can be heated on a flameless heater. The heat is…

A:

Q: Use standard enthalpies of formation to calculate the amount of heat released per kilogram of…

A: The combustion of hydrogen is given by

Q: Ammonium perchlorate mixed with powdered aluminium powers the space shuttle booster rockets:…

A: The given data: ∆Hf(H2O ,l) = -285.1 kJ/mol ∆Hf(NO, g) = 90.4 kJ/mol ∆Hf(HCl ,g) = -92.3 kJ/mol…

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A:

Q: 3. A 135.0 g sample of dilute hydrochloric acid is placed in a copper calorimeter with a mass of 465…

A: Q3) Given that: Mass of HCl sample = 135.0 g Mass of copper calorimeter = 465 g Specific heat…

Q: How many milliliters of water at 23 °C with a density of 1.00 g/mL must be mixed with 180 mL (about…

A: The net heat absorbed by water will be equal to the heat released by coffee. Determination of heat…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HC1(aq) → 2 MCl,(aq) + 3…

A:

Q: One origin of SO3 is the combustion of sulfur, which is present in small quantities in coal. S (5) +…

A:

Q: Consider these reactions, where M represents a generic metal. 1. 2 M's) + 6 HCI(аq) 2 MCl, (aq) + 3…

A:

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A: Interpretation - In the given above all the reactions , here we have to calculate the ∆Ho for the…

Q: Given the following information:   C (graphite) + O2 (g) → CO2 (g)                   ΔH°rxn = -393.5…

A:

Q: Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen…

A:

Q: The highly exothermic thermite reaction, in which aluminum reduces iron(III) oxide to elemental…

A: Heat is arises due to change in temperature and heat is transferred from hotter body to colder body.…

Q: 4. A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a…

A: • Specific Heat Capacity = qm.∆T J/g• Specific Heat Capacity = q.mm.∆T J/mol.Where,q → heat…

Q: Meals on wheels. Meals-ready-to-eat (MREs) are military meals that can be heated on a flameless…

A:

Q: When N2(g) react with O2(g) to form N20(g) according to the following equation, energy is absorbed…

A: If any system absorb heat then system has profit of energy or it requires energy to complete the…

Q: Consider these reactions, where M represents a generic metal. 2 M(s) + 6 HCI(aq) → 2 MCI, (aq) + 3…

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.