Can you use an approach similar to Hess’s law to calculatethe change in internal energy, ΔE, for an overall reaction bysumming the ΔE values of individual reactions that add upto give the desired overall reaction?

Q: Why do elements always have ΔH∘f=0? a) The standard state of elements is the reference point for…

A: •Given:- Here is question is asking that why ∆H°f always zero for elements.

Q: A gaseous reaction occurs at a constant pressure of 35.0 atmatm and releases 57.8 kJkJ of heat.…

A: According to first law of thermodynamics, the internal energy change of a system is equal to the sum…

Q: 7. Calculate the E for a process in which a gas is compressed from 3.4 L to 0.28 L accompanied by…

A: Please find below the formulas or relationships between the parameters since P = 2.5 atm  and ΔV =…

Q: 1. A gas is confined to a cylinder under constant atmospheric pressure. When 0.49 KJ of heat is…

A: Heat Heat is the result of the movement of kinetic energy within a material or an item, or from an…

Q: A chemist measures the enthalpy change AH during the following reaction: 2 HNO,) + Mg(s)→Mg…

A: Given thermodynamical Chemical equation is - 2HNO3(l) + Mg(s) -----> Mg(NO3)2(s) + H2(g)     ∆H =…

Q: Calculate ΔE for a system that absorbs 512.0  kJ of heat from its surroundings and does 295.0  kJ of…

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Q: A 72.0 mL sample of 1.00 M NAOH is mixed with 59.0 mL of 1.00 M H,SO, in a large Styrofoam coffee…

A: The given thermochemical equation is: H2SO4(aq) + 2NaOH(aq)  ----> Na2SO4(aq) + 2H2O(l) ; ∆Hrxn =…

Q: How much work (in J) is involved in a chemical reaction if the volume decreases from 4.00 to 1.26 L…

A: Given:Volume V1 = 4.00 LVolume V2= 1.26 Lpressure = 0.857 atm

Q: 2. When 1.0 g of sodium nitrate was dissolved in 50.0 g of water in a calorimeter at 20.0°C, the…

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Q: for a reaction that does work and releases heat under constant pressure which will have the larger…

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Q: The combustion of 2.295 g of propanol (C3H7OH) increases the temperature of a bomb calorimeter from…

A: Heat of Combustion- Is the measure of the amount of heat released when one mole of a substance is…

Q: Consider the following reaction: 2C6H6() + 15 O2(g)- 12 CO2(g) + 6 H20() AH = -5.869 x 103 kJ An…

A: Each reaction takes place account to their stoichiometric radio and account to those things the heat…

Q: A system releases 925 J of energy to the surroundings as heat while 211 J of work was done on the…

A: Consider the given information is as follows; Q (heat releases to the surrounding) = -925 J…

Q: Use the molar bond enthalpy data in the table to estimate the value of Δ?∘rxnΔ⁢Hrxn° for the…

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Q: hydrogen (H,) in a reaction called hydrogenation. Calculate the enthalpy change for this reaction,…

A: The heat of reaction is defined as the amount of heat that must be added or removed during a…

Q: When 1.045 g of CaO is added to 50.0 mL of water at 25.0 PC in a calorimeter, the temperature of the…

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Q: Calculate ΔE for the combustion of a gas that releases 471.8 kJ of heat to its surroundings and does…

A: Given: Heat = 471.8 kJ Work = 97.2 kJ

Q: A chemist measures the energy change AH during the following reaction: 2 Fe,O3(s) → 4 FeO(s)+O,(g)…

A: The balanced reaction taking place is given as,

Q: A chemist measures the enthalpy change AH during the following reaction: 2H,0(1) + O,(g)→2H,O2(1)…

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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 scientist measures the standard enthalpy change for the following reaction to be 36.8 kJ: CO₂(g) +…

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Q: Calculate ΔE for the combustion of a gas that releases 471.8 kJ of heat to its surroundings and does…

A: We are here given the combustion of gas as the system  Heat released by the system =-471.8 kJ…

Q: alculate the energy change of a reaction if it releases 23.0 kj of heat and the volume expands from…

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Q: A scientist measures the standard enthalpy change for the following reaction to be 6.7 kJ : CO(g) +…

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Q: H HHH н-с-с-с-с-н i iii H H H H 1. Consider the following chemical reaction for the combustion of…

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Q: Explain the following terms: (i) Internal energy of a system (ii) Bomb calorimeter

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Q: Complete combustion of 1 mol of acetone 1C3H6O2 liberates1790 kJ:C3H6O(l) + 4 O2(g)  -----> 3…

A: INTRODUCTION: Standard enthalpy of formation of a compound is defined as the enthalpy change when 1…

Q: 18. The combustion of propane is shown by the following equation: C,H;(g) + 50,(g) → 3CO,(g) +…

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