Consider the following reaction: 2 Mg + O2  2 MgO,  Hrxn = -1,203 kJ.Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg.

Q: 3. When potassium chloride reacts with oxygen under the right conditions, potassium chlorate is…

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Q: From a consideration of the reaction 2NO(g) + O2(g)  2NO2(g) H = 114.1 kJ if 2.00 * 10^2 g of…

A: given mass of NO2 = 2*102 g

Q: The heat of formation of Fe2O3(s) is -826.0 kJ/mol. Calculate the heat of the reaction 4Fe(s) +…

A: Given information,

Q: What was the initial temperature (in oC) of a 38.13 g sample of aluminum (specific heat = 0.900 J/(g…

A: Given :-  Mass of substance = 38.13 g  Specific heat = 0.900 J/g.K  Heat  = -1.077 kJ  Final…

Q: The reaction between sodium metal and chlorine gas produces 822 kJ of heat energy for every chlorine…

A: Given data, Mass of Na=1.416gEnergy produced for the given reaction=822kJ

Q: Calculate the amount of heat released

A: Number of moles = mass/molar mass  Molar mass of MgO is 40.3044 g/mol

Q: You heat approximately one cup (250 g) of water on the stove from 23 oC (~ room temperature) to 99…

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Q: What is the mass of an aluminum sample in grams (specific heat = 0.901 J/gºC) if addition of 2.27 kJ…

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Q: Aluminum metal reacts with chlorine with a display of sparks: 2 Al(s) + 3 C12(g) → 2 AICI3(s) AH =…

A: Given- Weight of Al=5.000g Molar mass =26.982g/mol  2Al(s)+3Cl2(g) -> 2AlCl3(s)

Q: Use the following thermodynamic data to calculate how much heat in kJ is required to change the…

A: Given : Mass of acetone = 66.1 g Initial temperature of acetone = -82.2 oC And final temperature of…

Q: The heat capacity of platinum (Pt, 195.1 g mol-1), is 26.0 J mol-1 K-1. Calculate the energy needed…

A: Q = n S ∆T  where  m = mass of the given metal = 66.6 g  n = W/M = 66.6 g/ 195.1 g/mol = 0.341 mol…

Q: Consider the following reaction:N2O(g) + NO2(g) → 3 NO(g)                      ΔHrxn = 155.6…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

Q: The fuel value of natural gas is 54.0 kJ/g how much heat results from the combustion of 2.84 kg of…

A: The fuel value of natural gas is given in kJ/g unit. So first convert the given mass of natural gas…

Q: What is meant by the specific heat capacity of an object

A: To define the specific heat capacity of an object.

Q: Consider the reaction: When a 10.0-g sample of ethyl alcohol (molar mass = 46.07 g/mol) is…

A: The given reaction is : C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l)        ∆H=-1.37×103 kJ

Q: 10. Consider the following reaction: 2 N2 (g) + O2 (g) - 2 NO2 (g) AH=+163.2 kJ a) How many grams of…

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Q: How much heat (in kJ) is produced by burning 104 g of CH4 under standard state conditions? AH° =…

A: Combustion is the process by which a substance gets burned in air, in presence of oxygen. The heat…

Q: The reaction between sodium metal and chlorine gas produces 822 kJ of heat energy for every chlorine…

A: The balanced reaction taking place is given as, => 2 Na (s) + Cl2 (g) -----> 2 NaCl (s)…

Q: When 108 g of water at a temperature of 23.1 °C is mixed with 66.1 g of water at an unknown…

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Q: Exactly 46.71 kJ of heat is transferred to a 1.429 kg slab of nickel at a temperature of 12.7°C. (a)…

A: a. The relationship between amount of heat of a substance and mass, specific heat, and change in…

Q: The reaction between sodium metal and chlorine gas produces 822 kJ of heat energy for every chlorine…

A: GIven, Mass of Na = 4.595g

Q: Why were we not able to simply use the specific heat capacity of water, 4.184 J/g°C?

A: Given that: Volume of water used = 100 mL specific heat capacity of water = 4.184 J/g oC Change in…

Q: When 2.0 mole of ZnO(s) decomposes to Zn(s) and O2 (g), the Δ H = 696 kJ of heat energy. What does…

A: Reaction involved:-  2ZnO(s) = 2Zn(s) + O2 (g)  ∆H = 696 kJ

Q: The value of ΔH0for the reaction is -126 kJ.  Determine the amount of heat that is released by the…

A: 2Na2O2 (s) + 2H2O (l) → 4NaOH(s) + O2 (g) molar mass of Na2O2 = 78.0 g/mol no of moles of Na2O2…

Q: 19.  How much will the temperature of a cup (180 g) of coffee at 95 °C be reduced when a 45 g…

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Q: When 0.5 mol of H2 is reacted with 0.5 mol of O2, 121 kJ of heat is released. Determine ΔHrxn for…

A: Given:  Moles of H2 =0.5  Moles of Cl2 = 0.5  Heat released = 121 KJ

Q: Hydrazine, N2H41), is used in rocket fuels. The thermochemical equation for the combustion of…

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Q: Calculate the heat released when 2.00 L of Cl2 (g) with a density of 1.88 g/L reacts with an excess…

A: Given: Volume of chlorine = 2.00L Density = 1.88g/L Temperature = 250C Pressure = 1 atm Molar mass…

Q: The combustion of hydrogen-oxygen mixtures is used to produce very high temperatures (ca. 2500 °C)…

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Q: What is the definition of enthalpy? O a. Heat flow in a chemical reaction at constant temperature O…

A: Enthalpy is Heat flow in a chemical reaction at constant pressure.

Q: Consider the following reaction: 2 Mg + O2  2 MgO,  Hrxn = -1,203 kJ.Calculate the amount of heat…

A: The enthalpy change or heat released/absorbed during a chemical reaction as represented by a…

Q: The reaction that was on the screen when you started and its derivative demonstrate that the…

A: given, the reaction H2O(l)→H2O(g), ΔH =44.0kJ

Q: When 5.49 g of a solid mixture composed of NH,Cl and CaClz was dissolved in 100.0 ml of water, the…

A: Given that -  Mass of mixture of NH4Cl and CaCl2 = 5.49 g  Volume of water = 100 mL  Increase in…

Q: The reaction between sodium metal and chlorine gas produces 822 kJ of heat energy for every chlorine…

A: The number of moles of any substance can be obtained by dividing the mass by molar mass which may be…

Q: Calculate ΔE of a gas for a process in which the gas evolves 24 J of heat and has 9 J of work done…

A: Applying 1st law of thermodynamics  ΔE = q + w  where ΔE is change in internal energy , q = heat…

Q: For the reaction C(graphite) + O2(g) → CO2(g)       Δ = –393 kJ How many grams of C(graphite) must…

A: The answer to the following question is given as -

Q: A system undergoes a process consisting of the following two steps:Step 1: The system absorbs 72 Jof…

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Q: What quantity in moles of H, are required to give off 2301 kJ of heat in the following reaction? N,…

A: We have to calculate the moles of hydrogen gas required.

Q: A 340.9 g sample of silver is subjected to a temperature change of -34.29 °C. The specific heat…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: 2Al(s) + 3Cl2(g) ----à 2AlCl3(s);    H = –1390.81 kJ  How much heat is produced/required when 10.0…

A: Moles of AlCl3 is calculated as,

Q: Based on the following reaction: Sb (s) + 3/2 Cl2 (g) → SbCl3 (g) AH = -314 kJ How much heat would…

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Q: 4. Consider the equations for these reactions: % N2 + % 02→ No AH = +90.4 kJ NO2 → NO + % 02 AH =…

A: Given data, The given chemical reactions are - 12N2 + 12O2 → NO   ------ (1)  The ∆H for equation…

Q: Consider the following reaction: 2Mg(s)+O2(g)⟶2MgO(s)ΔH∘=−1203kJ What mass of magnesium must be…

A: Magnesium reacts with oxygen to form magnesium oxide. The equation for the balanced chemical…

Q: The ΔH value for the reaction is -90.8 kJ. How much heat is released when 198.1 g Hg is reacted with…

A: Reaction involved :- 2Hg + O2 = 2HgO

Q: 2. The decomposition of ammonia gas into nitrogen gas and hydrogen gas is endothermic:   2 NH3 (g) →…

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Q: 15. The enthalpy change CH,(g) + 20,(g) → CO,(g) + 2H,O(1) breams is -891 kJ for the reaction as…

A: Given :

Q: 2) A piece of unknown solid substance weighs 437.2 g, and requires 8460 J to increase its…

A: Given that: Mass of the substance, m  = 437.2 g Initial temperature, Ti = 19.3 oC Final temperature,…

Q: 9. Consider the reaction NH4NO; (s) → NH4+ (aq) + NO3- (aq). When 1.25 g of NH,NO3 dissolves in…

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Q: Consider the following reaction: 2CH3OH (g) 2CH4 (g) + 02 (g) AH = 252.8 kJ. Atomic weights: C = 12…

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