Given the thermochemical equations   A(g)⟶B(g)                  Δ?=70 kJ     B(g)⟶C(g)                 Δ?=−120 kJ   find the enthalpy changes for each reaction. 2A(g)⟶2B(g) B(g)⟶A(g) A(g)⟶C(g)

Q: The change (delta) E of a system that absorbs 12.4 J of heat and does 4.2 J of work on the…

A: Given that, ∆H = 12.4 J w=4.2 J ∆E = ?

Q: A scientist measures the standard enthalpy change for the following reaction to be 543.2 kJ :…

A:

Q: 5.99 From the enthalpy of formation for CO, and the following information, calculate the standard…

A: Given data:  ∆H°=-283 kj/mol From standard table;  ∆Hf°(CO2(g) is given by, ∆Hf°=-393.5 kj/mol

Q: The following thermochemical equation is for the reaction of carbon monoxide(g) with water(l) to…

A: First the given balanced reaction is as follows, CO(g) + H2O(l)= CO2(g) + H2(g)     Observing the…

Q: 2. Given the following thermochemical equations and the corresponding enthalpy change for each…

A: Given: 2C (graphite) + H2 (g) → C2H2            ∆H = +226.7 KJ             equation (1) C (graphite)…

Q: A piece of unknown metal at 95.0oC with a mass 10.7 g place in a coffee-cup calorimeter with 100.0 g…

A: The principle of calorimetry is -                  Heat lost by Metal = Heat gained by Water Based…

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: What is the enthalpy, dH, when 176.1 g NiO reacts with unlimited sulfur dioxide in the following…

A: A numerical problem based on thermochemical reaction, which is to be accomplished.

Q: Using these reactions, fi nd the standard enthalpy change for the formation of 1 mol Pb0(s) from…

A: Using Hess law, we can calculate the standard enthalpy change.

Q: For which one of the following is the enthalpy of the reaction the same as the enthalpy of…

A: Enthalpy of fornation :-  The enthalpy change involved in the formation of 1 mole of a compound from…

Q: If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the…

A: The formula of heat is given by: q = m×c×∆THere, m = massc = specific heat∆T = change in temperature

Q: 3 C(s) + 4 H2 (g) --> (Q14) Find AHrxn (in kJ) for the formation of propane from its elements: C3H8…

A: When any reaction is multiplied by a common coefficient then the enthalpy of that reaction also…

Q: 4. The combustion of 1.00 mol of liquid octane (C,H13), a component of gasoline, at constant…

A: Given,  Burning of octane then heat release, q = 5.46 x 103 KJ Find,  Enthalpy change for burning 50…

Q: A 27.7-g sample of ethylene glycol, a car radiator coolant,loses 688 J of heat. What was the initial…

A: The heat lost (Q) by any ‘m’ mass of a substance is expressed as follows:

Q: A 27.3 g sample of ethylene glycol, a car radiator coolant, loses 695 J of heat. What was the…

A:

Q: Manganese reacts with hydrochloric acid to produce manganese(II)(II) chloride and hydrogen gas.…

A: Mass of Mn = 0.625 g Molar mass of Mn = 55 g/mol Mole(n) = 0.625/55 = 0.0114 mol Volume = 100 mL…

Q: For which one of the following substances is the standard enthalpy of formation, AHf, equal to zero?…

A: Answer: option b: lead [Pb(s)]; having standard enthalpy of formation (∆Hf), equal to zero.

Q: Given the thermochemical equations A(g) - - B(g) AH 60 kJ B(g) C(g) AH -140 kJ find the enthalpy…

A: A -------->  B     delta H = 60KJ B -----------> C     delta H = - 140KJ

Q: the complete combustion of methane, CH4(g), to form H2O(l) and CO2(g)at constant pressure releases…

A: Hello. Since more than one question has been posted, the first question shall only be answered in…

Q: What is the specific heat in J/g°C for a metal sample with a mass of 78.9 g which absorbs 753 J of…

A:

Q: A 26.9 g sample of ethylene glycol, a car radiator coolant, loses 671 J of heat. What was the…

A: Given :- mass of ethylene glycol = 26.9 g  Heat lost = 671 J  Final temperature = 32.5°C  Specific…

Q: Which of the following has a standard enthalpy of formation of zero?   a. H2(g) b. H2(s) c. H(g) d.…

A: To find: The substances having  zero standard enthalpy of formation a. H2(g) b. H2(s) c. H(g) d.…

Q: Which of the following substances (with specific heat capacity provided, c) would show the greatest…

A: The amount of heat absorbed or released is related to specific heat capacity as,…

Q: Calculate (a) q when a system does 49 J of work and its energy decreases by 70. J and (b) AE for a…

A: (a) The given data is as follows: The work done by the system = -49 J   (negative sign is there as…

Q: Given the following thermochemical equations: 1) 2N2(g) + 202(g) → 4NO(g) AH = 2(-180.5 kJ) 2)…

A: Calculate then enthalpy of the given reaction --

Q: which of the following standard enthalpy of formation values is not zero at 25°C:    Na(s)…

A:

Q: Research is being carried out on cellulose as a source of chemicals for the production of fibers,…

A: To get the final equation, First equation has to be reversed and multiplied by 6. Second equation…

Q: Given the following thermochemical equation: H2(g) + Br2(l) ⟶⟶ 2HBr(g)            ΔH = -72.4 kJ…

A:

Q: 6. A student is determining the enthalpy of solution for ammonium nitrate by adding ammonium nitrate…

A: We have find out the answer.

Q: 1. Given that AH°,( BaSOle) = -1,473 KJ/mol, using the given table, what is standard enthalpy change…

A: Given reaction is :  Ba2+ (aq) + SO42- (aq)---------> BaSO4 (s)  Enthalpy of formation of BaSO4…

Q: The thermite reaction in which aluminum metal reacts with iron(III) oxide to produce a spectacular…

A: The reaction is as follows: 2Al(s)+Fe2O3(s)--------->Al2O3(s)+2Fe(l).          ΔH =  -202.9 kcal.…

Q: A 74.8 g sample of a metal at 143.2 °C is added to an insulated vessel containing 208g of water at…

A: The given data contains, mass of metal =74.8 g mass of water =208 g initial temperature of water…

Q: Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the reaction: (1) CH4…

A:

Q: Find the molar enthalpy in kJ per mol of H2 of the reaction: H2(g) + Cl2(g) → 2 HCl(g) given that…

A:

Q: Solid aluminum metal and gaseous oxygen combine in the reaction below to form aluminum oxide:…

A:

Q: The work done by a system is 8 J, when 40 J heat is supplied to it. What is the

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What is the specific heat of a material when 55.2 g of it change temperature by 35.8 °C when it…

A: We have given that  Q= 4526J  Temperature change =∆T= 35.8°C  Mass of material = 55.2g  Specific…

Q: If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the…

A:

Q: Using Hess's Law to calculate net reaction enthalpy Nitric oxide (NO) can be formed from nitrogen,…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: Assume

A: Given: Fluid = Water m =  180 g T1 = 30 deg C T2 = 97 deg C Cp = 4.184 J/g-deg C

Q: dard enthalpy 6.68 (a) What is the value of the standard enthalpy of formation of an element in its…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Using the standard enthalpies of formation, what is the standard enthalpy of reaction? CO(g) + H,…

A: The given reaction is as follows: CO(g) + H2O(g) → CO2(g) + H2(g)  The standard enthalpy of the…

Q: Using standard heats of formation, calculate the standard enthalpy change for the following…

A:

Q: How much energy is required to increase the temperature of 175 mL of water from 18.5 ° C to 85.0 °…

A:

Q: O THERMOCHEMISTRY Using Hess's Law to calculate net reaction enthalpy Lindsay Dimethyl ether, a…

A: Applying concept of Hess law.

Q: 9.53 Using these reactions, find the standard enthalpy change for the formation of 1 mol of PbO(s)…

A: From the given two reactions, firstly we have to find out the reaction of synthesis of PbO. From…

Q: [Reférénces] When 23.6 g of calcium chloride, CaCl2, was dissolved in water in a constant-pressure…

A: Given that: Mass of CaCl2(m) = 23.6g Initial temperature(T1) = 25.0°C Final temperature(T2) = 38.7°C…

Q: 4. When a solution containing 8.00 g of NaOH in 50.0 g of water at 25.0 °C is added to a solution of…

A: Answer :-  3) The reaction will be non spontaneous at all temperature.  4)   ∆H = -50.19 (kJ) or  ∆H…