Multiple Choice 2. The value of ΔH0 for the reaction is -336 kJ. Determine the heat (kJ) released to the surroundings when 23.0 g of HCl is formed: CH4(g) + 3Cl2(g) → CHCl3(l) + 3 HCl(g) in kJ.   A. 177 B. 7 C. 211 D. -336

Q: Determine the molar enthalpy of reaction, ∆rHm? (kJ/mol) for the decomposition of NOCl 2 NOCl(g) −−→…

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Q: 8. The value of ΔH0for the reaction CH3OH(l) → CO(g) + 2H2(g) is +128.1 kJ. Determine the heat…

A: The amount of energy liberated or absorbed in a chemical reaction is expressed by the change in…

Q: Ametal radiator is made from 25.0 kg of iron. The specific heat of iron is 0.449 Jg °C. How much…

A: Given  mass = 25kg  c = 0.449J/gC  Temp change = 15°C to 63°C  We have to find heat

Q: The value of ΔH0for the reaction CH3OH(l) → CO(g) + 2H2(g) is +128.1 kJ. Determine the heat consumed…

A: The given reaction is                                         CH3OH(I)→CO(g)+2H2(g)        ∆H=128.1J

Q: 19. One reaction of iron with hydrochloric acid is represented by the following thermochemical…

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Q: A 140.0 g sample of water at 25.0C is mixed with 114.0 g of a certain metal at 100.0 °C. After…

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Q: H.W) How much heat energy is needed to raise the temperature by 15°C of: (1)25 g water (µ=4.148 J/(g…

A:

Q: 4. Consider the reaction 2 H2 (g) + O2 (g) → 2 H2O (g) having AH = -484 kJ/mol. Determine the…

A: In the given case, hydrogen is the limiting reagent for the reaction because 4 mol of hydrogen gas…

Q: 4. Consider the reaction 2 H2 (g) + O2 (g) → 2 H2O (g) having AH = -484 kJ/mol. Determine the…

A: Interpretation: The reaction 2H2 (g) + O2 (g) → 2H2O (g) having ∆H = -484 kJ/mol. The magnitude of…

Q: A 140.0-g sample of water at 25.0°C is mixed with 111.7 g of a certain metal at 100,0°C. After…

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Q: Consider the generic reaction below. Which is higher on the enthalpy scale A or B?               A…

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Q: רPi How much heat will be released (AH) if 0.2037 mol of NH3 are mixed with 0.20 mol of O2 in the…

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Q: A 132.3 g piece of copper (specific heat 0.38 J/g･°C) is heated and then placed into 400.0 g of…

A: Qwater = m × S × ∆T Where        m = mass of water = 400 g        S = specific heat of water = 4.18…

Q: he value of ΔH0for the reaction is -126 kJ. Determine the heat released when 2.00 mol of NaOH is…

A: For a chemical reaction, the enthalpy of reaction (ΔHrxn) is the difference in enthalpy between…

Q: A coffee-cup calorimeter contains 30 mL of water with an initial temperature of 24.8°C. An unknown…

A:

Q: The value of AH° for the reaction below is -82 kJ. kJ of heat are released when 80.9 grams of HBr is…

A: The balanced reaction given is, Given: ΔH of reaction = -82 KJ. And mass of HBr formed = 80.9 g.

Q: 2.929 g of NH4Cl (53.19 g/mol) are added to 50.0 mL of water (18.02 g/mol, density = 1.00 g/mL) and…

A: Enthalpy change can be calculated by a general caloriemeter formula i.e. - Q = mS (ΔT) Here,   Q =…

Q: Consider the combustion of butane: 2C4​H10​(g)+13O2​(g)-->8CO2​(g)+10H2​O(l), ΔHrxn = −2878 kJ/mol…

A: The enthalpy of combustion of a substance indicates the enthalpy change produced as a result of the…

Q: Circle the best answer for the following scenarios:  CH4 + 2 O2 ⟶ CO2 + 2H2O + 890 kJ i.…

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Q: 6. The reaction for the combustion of octane, CeH18, is shown below. 2 CH18(g) + 25 0:(g)16 CO:(g) +…

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Q: Use the thermodynamic data in the table below to calculate how much heat in kJ is required to change…

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Q: What quantity of heat (in kJ) will be released if 0.1739 mol of NH3 are mixed with 0.200 mol of O₂…

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Q: When a 9.01-g sample of solid iron(II) chloride dissolves in 55.7 g of water in a coffee-cup…

A: heat of dissolution is heat released when a salt is dissolved in water and it breaks into ions and…

Q: CaCO3(s) + 2 HCl(aq) –––> CaCl2(aq) + H2O(l) + CO2(g); ∆H° = -15.2 kJ Given the thermochemical…

A: We have to calculate the amount of heat liberated.

Q: Consider the following reaction: CH4 (g) + 202 (g) → CO2 (g) + 2H20(1) AH = -891 kJ How much heat…

A: The heat released per mole of CH4 = ∆Hrxn / Moles of CH4 per reaction (Stoichiometric Coefficient)…

Q: 11) When potassium chloride reacts with oxygen under the right conditions, potassium chlorate is…

A: Since you are posted with multiple questions. As per the rule I am answering first question only.…

Q: When a 5.12-g sample of solid sodium nitrate dissolves in 58.0 g of water in a coffee-cup…

A: First of all calculate the heat involved in the process by the given amount (moles) of solute by…

Q: The value of ΔH0for the reaction CH3OH(l) → CO(g) + 2H2(g) is +128.1 kJ. Determine the heat consumed…

A:

Q: A 140.0-g sample of water at 25.0°C is mixed with 101.1 g of a certain metal at 100.0°C. After…

A: Specific heat capacity of an element or a compound is equal to the amount of heat released or…

Q: A 140.0-g sample of water at 25.0°C is mixed with 129.8 g of a certain metal at 100.0°C. After…

A: The hot metal will release the heat and that is taken by water and gets the equilibrium temperature.

Q: The value of ΔH° for the reaction below is -72 kJ. Therefore, ________ kJ of heat are released when…

A: ΔH° < 0 => heat is releasing in the reaction. Since when 2 mol of HBr is forming, -72 KJ =…

Q: Magnesium oxidizes via the reaction: 2 Mg + O2 → 2 MgO The reaction has a △Hrxn = -1203 kJ. How…

A: 2Mg+O2→2MgO∆Hrxh=-1203 KJNumber of moles of O2=3 moles

Q: When 50 mL of 0.100 M AgNO3 is combined with 50 mL of 0.100 M HCl in a coffee-cup calorimeter, the…

A: YOu need to know that both solution are aq and the volume is additive in nature. the Heat absorbed…

Q: 10.) The heat of formation of H2SO4 (ag) is -909.27 kl/mol. Which of the following is the…

A: Given:  Heat of Formation for H2SO4 is -909.27kJ/mol

Q: The standard heat of formation of HCl(g) is -92.3 determine Hrxn (in KJ) for a reaction:…

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Q: When 1 mole of H₂S(g) reacts with H₂O(1) to form H₂(g) and SO₂(g) according to the following…

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Q: A 395.7 g sample of water at 20.0 °C is mixed with 100.0 g of a certain metal at 95.0 °C. After…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of 1 kg…

Q: What mass of methane (CH4) must be burned to release 185 kJ of heat?  CH4 (g) + 2O2(g) → CO2(g) + 2…

A: Solution:-

Q: 3) A student places 120.0 mL of liquid water at 23.4 °C into a calorimeter and then dissolves 12.5 g…

A: It is an endothermic reaction. Detail solution is given in step 2.

Q: A 33.6-g piece of silver initially at 46.5 °C is submerged into 162.4 g of water at 12.3 °C. What is…

A: A hot piece of silver is submerged into cold water, as a result heat will flow from hot silver to…

Q: Assume that the specific heat of the solution is the same as that of pure water. 5.54 (a) When a…

A: Given: Mass of solution= 60g  Mass of sample = 3.88g Initial temperature = 230C Final temperature =…

Q: Use Hess's law to calculate ΔG° rxn using the following information.  ClO( g) + O 3( g) → Cl( g) +…

A: Given: 1st equation.  2 O3 ( g) → 3 O2 ( g).  ΔG° rxn = +489.6 kJ 2nd equation  Cl(g) + O3(g) →…

Q: onsider the following reaction. CH3OH(g)  CO(g) + 2 H2(g)    H = +90.7 kJ ((b) Calculate the…

A: Note - Since you have asked a question with multiple sub-parts, we will do the first three…

Q: A 12.5-g sample of granite initially at 82.0 °C is immersed into 25.0 g of water that is initially…

A: The final temperature for granite and water = X Initial temperature for Granite = 82◦ C Temperature…

Q: 13. The value of AH° for the reaction below is +128.1 kJ: CH,ОН() —> СО(g)+ 2H ,(g) How many kJ of…

A:

Q: Charcoal is primarily carbon. Determine the mass of CO2 produced by burning enough carbon (in the…

A: Given  ∆H0rxn  = -393.5 kJ       | unit of ∆H0rxn = kJ not k  Amount of heat energy produced = 5*102…

Q: The value of ΔH0 for the reaction CH3OH(l) → CO(g) + 2H2(g) is +128.1 kJ. Determine the heat…

A: Given, The balanced chemical equation is given below, CH3OH(l) → CO(g) + 2H2(g) ΔH0=+128.1 kJ

Q: the reaction below is -72 kJ. Therefore, ________ kJ of heat are released when 5.0 mol of HBrHBr is…

A: According to balanced equation -72KJ of heat is released when 2 moles of HBr is formed.   It is…

Q: 9. Consider the reaction NH4NO; (s) → NH4+ (aq) + NO3- (aq). When 1.25 g of NH,NO3 dissolves in…

A:

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.