1. Classify the following reactions as endothermic or exothermic: a. Ca(s) + Cl2(g)→ CaCl2(s) b. H2O1) + CO2(g) → H2CO3(aq) AH°25°C = -795 kJ AH°25°C = 19kJ

Q: the following reaction? 2 Pb)+ 4 Ch(g) → 2 P6C14 D. 784 kJ B. 392 kJ thalpy for the reaction: C(9)…

A: 13) As we know,  if the reaction is multipled by any digit then □H is also multipled by same digit.…

Q: for the first reaction shown from the remaining reactions. AH rXn Calculate AHD, N204 (g) - 2NO (g)…

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Q: Given the following reaction    2NO(g)  +  O2(g) --> 2NO2(g)         ΔH(rxn) =   -114.2 kJ   If…

A:

Q: Given the reaction below, calculate delta Hf for the sulfate(SO3^2-) ion. SO3^2-(aq) + 2H+(aq) +…

A: Given reaction is: SO32-(aq)+2H+(aq)+2NO3-(aq)→SO42-(aq)+2NO2(g)+H2O(l)

Q: Consider the following reaction.    2O3 → 3O2 ΔH = -428 kJ  Which of the following reactions…

A: If the reaction is reversed , the sign of enthalpy changes . If a number is multiplied to the…

Q: The combustion of ethane is shown below. 1 C2H6 (g) + 7/2 O2 (g) → 2 CO2 (9) + 3 H20 (g) AHP =…

A: correct option   C. C

Q: H2O

A: 3C (graphite) + 3O2 (g) ------> 3CO2 (g)​​.....(d)  ∆Hb = 3 • ( -393.5 kJ )  ∆Hb = -1180.5 kJ

Q: Which case is catalyzed in the following diagrams? 50 45 40 35 30 25 20 50 45 40 35 30 25 20 15 10…

A: The correct option is:

Q: Calculate ΔHΔH for the reaction 2 Al (s) + 3 Cl2 (g) ⟶⟶ 2 AlCl3 (s) from the following data. 2 Al…

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Q: 38. Calculate AH for the reaction: IFs (g)→ IF3 (9 + Fzg)- IF3 (a AH = -390 kJ AH = -745 kJ C 1135…

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Q: 2 A2B (Green) + 3 C2 = 2 A2Ć (yellow) + 2 BC2 AH = -288 kJ A.The reaction will shift to the left in…

A: We have given that  2A2B(green)  + 3C2 <----> 2A2C (yellow )  + 2 BC2  and given that…

Q: 2. Enthalpy: When solutions containing silver ions and chloride ions are mixed, silver chloride…

A:

Q: 4. Calculate A H for S (s) +0,(9) → so;(g) based on the reactions: S (s) + 02 → S02 (g) 2502 (g) +…

A: Given,  S (s) + O2 → SO2 (g); ∆H = - 296 kJ .......(1) 2SO2(g) + O2(g) → 2SO3 (g); ΔΗ =-198.2…

Q: Calculate the∆H for the reaction (6 points) NO(g)  + O(g)   →   NO2(g) Given the following   ∆H…

A:

Q: Given the reactions below, answer the following questions. Cl2(g) + F2(g) ----> 2ClF(g)    ΔG∘rxn…

A: given information: Cl2(g) + F2(g) ----> 2 ClF(g)    ΔG∘rxn = 115.4 kJ/mol  -------->…

Q: In Question 6 what is the value of AH in kJ for each of the four given reactions as well as the…

A: Enthalpy change in a reaction is calculated by subtracting the enthalpy of reactant from the…

Q: How to determine if the reaction moves to the right or left (toward products or reactants)? a/ N2O4…

A: If the the change in gibb's free energy is negative then the reaction will proceed towards right…

Q: For which of the attached reactions is ΔSo a positive value?

A:

Q: For a reaction with ?H° = 40 kJ/mol, decide which of the following statements is (are) true. Correct…

A: a. False statement. Positive value of enthalpy shows the reaction is endothermic.b. True statement.…

Q: 21. CH3CH=CH2 – CH3CH2CH3 What reactants (and catalysts) are needed to make the reaction above…

A:

Q: How to determine if the reaction moves to the right or left (toward products or reactants) just by…

A: N2O4 (g) <=> 2NO2 (g) The number of moles of products is greater than the reactants,…

Q: Which reaction represents this energy diagram? (8F0-(8)H7 AH --486.3 kJ 21,0(g) O 486.3kJ + 2H2O(g)…

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Q: Which following reaction is Exothermic and which is Endothermic ?P Cl5 + 92.9 KJ ---------------- P…

A: If a reaction is endothermic, then delta H is positive (+heat) on the left side of the equation,…

Q: 1. Predict whether a decrease in temperature is a favorable or an unfavorable process for the…

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Q: Consider the reactions C2H5OH(/) + 3 O2(g) → 2 CO2(g) + 3 H20(/) AH = - 1366.8 kJ C(graphite) +…

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Q: A potential energy diagram is shown. 70 60 Products 50 40 30 Reactants 20 10 Reaction Pathway What…

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Q: What is ΔE for the reaction, in units of kJ/mol?

A: The amount of heat released in the reaction (qrxn) is equal to the heat absorbed by the calorimeter

Q: Use Hess's Law and the given data to calculate AH for the reaction: N.O(g) + NO:(g) 3NO(g) N2(g) +…

A: Given,

Q: Answer the following questions by stating whether the reaction will occur spontaneously or not at…

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Q: What is DH°rxn (in kJ) for the reaction - CH4(g) + 202(g) · CO2(g) + 2H20(1). --> DH°f (CH4(g))…

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Q: O(g) + e–(g) --> O–(g)    ∆Hº = –142 kJ mol–1 O(g) + 2 e–(g) --> O 2– (g) ∆Hº = +702 kJ mol–1…

A: From the given equations, it is clear equation (3) can be obtained by adding the reverse of equation…

Q: 21. Given the following two equations С-Н-ОН(1) + 3 O2(8) → 2 CO2(8) + 3 H2O(1) AH = -1370 kJ…

A:

Q: Calculate the AHrxn for the reaction, Sn (s) + Cl2 (g) - SNC12 (s) AHrxn = ? Sn (s) + Cl2 (g) Sn (s)…

A: The enthalpy of a reaction can be determined by Hess's law. According to Hess law, the change in…

Q: A free energy diagram for a generic reaction, reactants products, shown below. On the horizontal…

A: We are given a graph of Gibbs free energy of reaction(Grxn) versus the extent of reaction.

Q: Which reactions are exothermic?   Reaction 1: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) + 2220 kJ…

A: in any reaction  in which energy is released is said to be exothermic reaction.

Q: 5/5/21 1) Energy content of the reactants? 2) Energy content of the products? 3) Energy content of…

A: Energy diagram of reaction is given  Energy of reactant = ? Energy of product  = ?  Energy Content…

Q: 2Cr(s) + 6HF(g) -à 2CrF3(s) + 3H2(g) H° = –691.4 kJ/mol 2Cr(s) + 6HCl(g) --à 2CrCl3(s) +…

A: According to the Hess’s law of constant heat summation, the total change in the enthalpy during the…

Q: For the reactions, Sn (s) + Cl2(g) → SnCl2s) +84 kcal SnCl2(s) + Cl2(g) → SnCls) +47 kcal Find the…

A: The enthalpy of the reaction is considered as the state function that is it depends only on the…

Q: Reaction A has a AH of -65KJ and reaction B has a AH of +405 kJ. Reaction C is the combination of…

A: Reaction A has ∆H = -65kJ  Reaction A has ∆H = +405kJ

Q: 2HX(g) H2(g) + X2(g) Estimate the energy change (in kJ) for the reaction with the following X. F i…

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Q: Given the following three reactions: C (s) + 2 H2 (g) ------> CH4 (g) AH = -33.1 kJ C (s) + 2 Cl2…

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Q: CH) +2 Oze) CO2 +2 H,On 74 COe +2 H20 CH4) + 20z 2 C,HIo + 25 0z) → 16 CO + 18 H20 2 CH,OH +3 0z) →…

A: Endothermic reaction -  Temperature of products lower than reactants. ∆H = positive. General…

Q: If a reaction has an equilibrium constant just greater than 1, what type of reaction is it?…

A:

Q: Consider the reaction: 4A + B= 2C.        Δ H=-443.6Kj/mol what reaction corresponds to a H of…

A: The given reaction is as follows: 4A + B= 2C................. Δ…

Q: Given the following exothermic reaction : Fe3+(aq)+SCN-(aq) FeSCN2+(a1), what will cause the…

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Q: Substance AH, AgCl AgCN HCl -129.888 kJ/mol 141.8 kJ/mol -171.728 kJ/mol HCN 108.5 kJ/mol HCl + AgCN…

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Q: 8. Select the endothermic reaction. CH4(s) + O2(g) → CO>(g)+ 2 H,O(1) + 890 kJ 2 HC1(g) + 185 kJ →…

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Q: The standard reaction free energy AG° = - 190. kJ for this reaction: CH3OH(g) + CO(g) -»HCH3CO2(l)…

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Q: The balanced equations for two reactions are shown. (1) CH4 + N2 + H2 → CH3N + NH3 (2) CH4 + I2 →…

A: Thermodynamics is branch of chemistry in which we deal with the heat of reaction. Heat of reaction…

Q: 4. The AH for the reaction Hgm + ½ Oze) → HgQe is -90.83 kJ. What is the AH for the reaction 2…

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.