Calculate the standard enthalpy of formation for diamond given the following reactions and using Hess’s Law: C(graphite) + O2(g)  -->  CO2(g)              ΔH = -393.5 kJ/rxn C(diamond) + O2(g)  -->  CO2(g)              ΔH = -395.4 kJ/rxn

Q: Calorimeter can be used to identify a metal by determining its specific heat when a hot pellet of…

A: The amount of heat required to increase the temperature of one kilo gram of a substance by one…

Q: The enthalpy change for the reaction of hydrogen gas with fluorine gas to produce hydrogen fluoride…

A: Applying unitary method calculation with the help of chemical reaction.

Q: Calculate the standard enthalpy of formation of nitric acid using the following equations: 4NH3(g) +…

A: According to Ostwald's process the chemical equation for the formation of nitric acid is: NH3(g) + 2…

Q: what is the standard enthalpy of reaction?   CO(g)+H2O(g)⟶CO2(g)+H2(g)

A: The standard free energy of formation can be defined as the change in energy which occurs when a…

Q: Consider the following reaction: CH4 (9) + 20, (g) → CO2(9) + 2H, 0(1) AH=-891 kJ a. Calculate the…

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Q: (a) Elemental boron reacts with fluorine to form BF3, a gas. Write a balanced chemical equation for…

A: (a) Elemental boron react with fluorine to form BF3 , which is a gas.  The reaction equation is ,…

Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73 J…

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Q: Nitric oxide (NO) can be formed from nitrogen, hydrogen and oxygen in two steps. In the first step,…

A: The reactions given are, 1) N2 (g) + 3 H2 (g) -------> 2 NH3 (g)                        ΔH = -92…

Q: enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

A: Enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

Q: If 240 kJ of heat is required at constant pressure to decompose 2.0 mol of a substances to form its…

A: Standard Enthalpy of formation(∆Hfº): The standard enthalpy of formation is defined as the energy…

Q: Insoluble Li₂ CO3(s) precipitates when solutions of Na2CO3(aq) and LiCl(aq) are mixed. Na2CO3(aq) +…

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Q: The standard heat of formation, ΔH∘fΔHf∘, is defined as the enthalpy change for the formation of one…

A: The given reaction is, C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) The heat of formation values given by…

Q: The standard enthalpy change for the following reaction is 401 kJ at 298 K. 2 CH3OH(g)2…

A: • Given,         2 CH3OH(g) → 2C(s,graphile) +4H2(g)+O2(g),                              ∆H°=401 KJ…

Q: A scientist measures the standard enthalpy change for the following reaction to be -111.2 kJ :…

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Q: Indicate the sign of the enthalpy change, in the following processes carried out under atmospheric…

A: Exothermic reactions are those in which energy is released while endothermic reactions are those in…

Q: A scientist measures the standard enthalpy change for the following reaction to be -820.7 kJ…

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Q: Given the thermochemical equations below, calculate the standard enthalpy change for the following…

A: EXPLANATION: Standard enthalpy change is defined as the change in enthalpy of compound when there is…

Q: Sand is converted to pure silicon in a three step process. The third step is   SiCl4(g) + 2Mg(s) →…

A: Given:SiCl4(g)  + 2Mg(s) → 2MgCl(s)  + Si(s)        ΔH  = –625.6 kJ

Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 68 J…

A: The process happening on the system is of two steps given as,

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: The enthalpy of combustion of methane gas is -890 kJ/mole. Write a balanced thermochemical equation…

A: Given, ∆H = -890 KJ/mol Mass of CH4 = 48 g

Q: For which of the following reactions is ΔH∘rxnΔHrxn∘ equal to ΔH∘fΔHf∘ of the product(s)?You do not…

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Q: The standard enthalpy changes for formation of ammonium oxide and iron 3 oxide are 2Al+3/2O^2→Al2O^3…

A: The standard enthalpy of particular reaction can be calculated from the standard enthalpies of the…

Q: enthalpy change for the following reaction to be -826.6 kJ : Fe2O3(s) + 2 Al(s)Al2O3(s) + 2 Fe(s)…

A: Heat of reaction is defined as difference of energy of product  and energy of Reactant. If heat of…

Q: Consider the following thermochemical equation: 2 Mg(s) + O2(g) --> 2 MgO(s) ∆H° = –1204 kJ What…

A: Hess' law: Sum of standard enthalpy of formation of reactant is subtract from Sum of standard…

Q: A scientist measures the standard enthalpy change for the following reaction to be -819.0 kJ :CH4(g)…

A: The given reaction is, Standard enthalpy of formation of CH4(g), O2(g) and H2O(g) is given below,

Q: Many portable gas heaters and grills use propane, C3H8(g). Using enthalpies of formation, calculate…

A: C3H8+5O2(g)→3CO2(g)+4H2O(l)                 ∆H°rxn=?Known values:-∆H°fCO2=-393.3 KJmol∆H°fH2O…

Q: Consider the following reaction in a vessel with a moveable piston. R (g) + T (g) -> X (g) As the…

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Q: A scientist measures the standard enthalpy change for this reaction to be 2863.2 kJ/mol. 6CO2(g) + 6…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: You add some of the white crystals to a small test tube filled with water. The water in the test…

A: This can be calculated by specifi heat formula, CP = (dH/dT)P dH = Enthalpy change  dT = Temperature…

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

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Q: Calculate the molar enthalpy change of H2O(1) when liquid water is heated from 41.7°C to 76.2°C.

A: Given :  Initial  temperature  = 41.7°C  Final temperature = 76.2°C  Molar mass of H2O(l) = 18 gm/…

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

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Q: The enthalpy for formation of NH3(g) is -45.9 kJ/mol. What is the reaction enthalpy for the…

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Q: Calculate the standard enthalpy of reaction for the reaction 2Na + 2H2O——> 2NaOH+ H2. Standard…

A: The reaction is given below.

Q: A fuel was used to heat water in a calorimetry experiment. When butane was burnt, 96070.0 J of heat…

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Q: The standard formation of the heat of a compound is the change in enthalpy that accompanies the…

A: In thermodynamics, When a system is under observation, there are a number of parameters that are…

Q: A scientist measures the standard enthalpy change for the following reaction to be -901.8 k) :…

A: Given, the standard enthalpy change for this reaction = -901.8 kJ We have to calculate the standard…

Q: Consider the hypothetical reaction: A + 3B → 2C, which gives ΔH0= 357.2 kJ. Determine the enthalpy…

A: Exothermic reaction releases the energy during occurrence. Here, the enthalpy of the substrates is…

Q: How much will the temperature of a cup (180 g) of coffee at 95 °C be reduced when a 45 g silver…

A: The heat lost by the coffee cup is gained by silver spoon.This relationship can be written as shown…

Q: A scientist measures the standard enthalpy change for this reaction to be 134.5 kJ/mol: Fe2O3(s) + 3…

A: The expression of change in enthalpy is shown below:

Q: In walking 1 km, you use about 100 kJ of energy. Thisenergy comes from the oxidation of foods, which…

A: Given  100 kJ energy is used in 1 km walking Energy comes from oxidation of foods is 30% efficient.…

Q: 1. Calcium carbonate decomposes at high temperatures to form carbon dioxide and calcium oxide: Given…

A: We have given that  Calcium carbonate decomposes at high temperatures to form carbon dioxide and…

Q: A scientist measures the standard enthalpy change for this reaction to be -818.2 kJ/mol: Fe2O3(s) +…

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Q: A scientist measures the standard enthalpy change for the following reaction to be -67.6 kJ :…

A: The expression for the calculation of change in enthalpy is shown below: where; ∆Hproducts =…

Q: Using enthalpies of formation, calculate the standard change in enthalpy for the thermite reaction:…

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Q: Use the References to access important values if needed for this question. Given the standard…

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

Q: -. The contents of the closed box in each of the following illustrations represent a system, and the…

A: Since numerical values of w or Q are not given, we have to use sign convention to find the sign of…