2- The values for A°m A2B , X3Y2 and A3Y are 2.4 , 1.5 and 1.8 respectively. Calculate the A°m for XB ?

Q: The value of Keq for the following reaction is 0.16: A (g)  +  B (g)  <==>  C (g)  +  D (g)…

A: The equilibrium constant, Keq for a reaction is given as :

Q: [7] Use the thermochemical equations provided below to determine AHn° at 25 °C for the following…

A: d*2, we have :  4B(s) + 6H2(g) = 2B2H6(g) ∆H = 72 kJ/mol  ....(1)  a*2 and applying…

Q: 1. Calculate the AHrxn for the reaction, Sn (s) + Cl2 (g) → SnCl2 (s) AHrxn = ? Sn (s) + Cl2 (g) →…

A:

Q: 1) For which one of the following reactions is AH° predicted to be positive? a. CaCO3(s) →→→…

A: Answer:- This question is answered by using the simple concept of determination of enthalpy change…

Q: When 13.8 mL of 0.870 M lead(I) nitrate reacts with 90.0 mL of 0.777 M sodium chloride, 0.579 kJ of…

A: Number of moles = Molarity x Volume (L)

Q: Which of the following steps is NOT necessary when calculating AG°rxn A for the following reaction…

A:

Q: Given the following chemical reaction in the gas phase: 2A(g) = B(g) + C(g) With: AHo = 27.0kJ y K =…

A: The given reaction is,   2A(g) <----->  B(g) + C(g)      ΔH0 = 27.0 kJ       K  =  [B] [C] /…

Q: Consider the following data. N₂(g) + O₂(g) = 2 NO(g) 2 H₂O(1)=2 H₂(g) + O₂(9) 4 NO(g) + 6 H₂0 (1) =…

A: Hess's law states that the enthalpy of a reaction is independent of the number of steps or chemical…

Q: A system contains 1.5 atm N2, 4.0 atm H2, and 0.75 atm NH3 at 400. K. N₂(g) + 3H₂(g) ⇒ 2NH3(g) AG =…

A:

Q: 6.) The diagram below shows the deposition of iodine vapor at room temperature. Which statement is…

A: The ordered system is the indication of low entropy. While less orderliness is the indication of an…

Q: Which of the following compounds has the greatest mass percent hydrogen (%H)? C₂H6 CH4 O C₂H₂ O C6H6…

A: Mass percent = (Mass of the element in 1 mol of the compound/molar mass of the compound) × 100 %

Q: Calculate AS° for C3H4(g) + 2 H2(g) → C3H3(g).

A: The formula to calculate standard entropy change is as follows: ΔS°=∑nSproducto−∑nSreactanto

Q: For which one of the following reactions is the value of AH°rxn equal to AH°; for the product? O 2H2…

A:

Q: To which one of the following reactions, occurring at 25°C, does the symbol AH°, [H,SO,(1)] refer?…

A: The enthalpy change for the formation of 1 mole of the substance from its constituent elements in…

Q: For the following reaction: C3H4(g) + 2 H2(g) → C3H8(g); AG' = -76.7 kJ/mol. Calculate the value of…

A: In the given question we have to calculate the change in free energy (∆G) of the following Reaction…

Q: is the potential energy of the particles the highest under such conditions? a b Select an answer and…

A: The substance has high boiling point means lower the vapour pressure and vice versa. Due to this the…

Q: Calculate AH for the reaction below using Hess' law. C2H6(g) → C2H2(g) + H2(g) AH=? C2H2(g)…

A:

Q: 4. Using the tabulated values, calculate AS for the following reactions (Table on the next page): a.…

A: Answer:Here: ai and bi are the stoichiometric coefficients

Q: Predict the sign for B. AS° is negative AS° is & 0 C. AS° is positive

A: If entropy increases, then ΔSo is positive.   If entropy decreases, then ΔSo is negative.  Entropy…

Q: Automobile airbags contain solid sodium azide, NaN,, that reacts to produce nitroge 2 NaN, (s) 2…

A:

Q: Most of the coal available in the United States is bituminous or "soft" coal, which contains as much…

A: Initial reaction rate is directly proportional to the temperature and inversely proportional to the…

Q: Which of the following is a possibility when AG is negative at any temperature? O AH > 0, AS 0 AH >…

A:

Q: Consider the reaction: H20(!) → H20(g) at 110°C Which of the following shows the correct signs or…

A: We have to show the correct signs or values for ∆H,∆S and∆G as follows in step 2:

Q: Liquid butane combust in air. Predict the sign for Delta G, Delta S, and Delta H at 25 Degrees…

A: Liquid butane on combustion in air produces carbon dioxide, water and heat energy. 2 C4H10 (l) + 13…

Q: Which of the following is a possibility when AG is positive at any temperature? Ο ΔΗ 0, AS « 0 AH >…

A:

Q: When 13.8 mL of 0.870 M lead(II) nitrate reacts with 90.0 ml of 0.777 M sodium chloride, 0.579 kJ of…

A: For Lead(II) Nitrate : Molarity = 0.870 M = 0.870 mol L-1 Volume = 13.8 mL = 0.0138 L   For Sodium…

Q: 6. Alyssia dissolves 4.00 g of sodium hydroxide, NaOH(s), In 200 mL of 0.5 mol/L solution of…

A: The objective of the question is to find the final temperature of the solution when sodium hydroxide…

Q: For a particular process , delta G = delta H at a given temperature and pressure. Therefore,  A.…

A: Given: At a given temperature and pressure, the ΔG = ΔH.

Q: Substance C3H4 (g) H₂(g) CsHs (9) Calculate AS for C3H4(g) + 2 H2(g) →→→ C3H3(g). S° (J/mol-K) 266.9…

A: We have been given values of standard entropies of each reactant and product species involved in…

Q: A continuous external pressure of 3.0 atm compresses the gas in the cylinder, which has a volume of…

A: Option D) w<0, q>0, ∆H>0, ∆U>0

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: The value of Keq for the following reaction is 0.25:                 SO2 (g)  +  NO2 (g)  <==>…

A: The equilibrium constant, Keq for a reaction is given as :

Q: Determine whether each of the following reactions would have a positive or negative AS value. a.…

A: Introduction To determine the sign of the entropy change (ΔS) for each reaction, we need to consider…

Q: Hess's Law II Calculate A,H for the reaction, from the following information: 2 Ni(s) + 1/4 Sg(s) +…

A: The question is based on the concept of Hess's law. It states that the net enthalpy change during a…

Q: The gas cyclopropane, C3H6(g), can be used in welding. When cyclopropane is burned in oxygen, the…

A: Answer:The law of conservation of energy states that energy cannot be created nor destroyed, it can…

Q: Given that for H,0,(g) → H,0(g) + ½ O,(g), AH° = -106 kJ mol- 1, and AS° = 58 J K-'mol-1, which ONE…

A: The reaction given is, => H2O2 (g) → H2O (g) + 12 O2 (g) Given: ΔHo = -106 KJ/mol = -106000 J/mo.…

Q: 3 R.Calculate the AS (J/K), if the pressure is 2 The temperature of 6 mole of an ideal gas is…

A: correct answer is option d. 180.8

Q: D= Delta symbol   Using Hess’s law (the indirect method) show how you can combine the following…

A: Hess law states that if a reaction can take place by more than one path and the initial and final…

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.