When 18.5 g of HgO(s) is decomposed to form Hg(l) and O2(g), 7.75 kJ of heat is absorbed at standard-state conditions. What is the standard enthalpy of formation (ΔH°f) of HgO(s)? -the answer is -90.7kJ/mol, what's the solution?

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

A:

Q: 13) Carbon tetrachloride can be formed by reacting chlorine with methane: CH4 + 2 C2 - ca4 + 2 H2…

A: The Heat of Reaction, ΔHºrxn (also known and Enthalpy of Reaction) is the change in the enthalpy of…

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: When a 8.00 g sample of KCI is dissolved in water in a calorimeter that has a total heat capacity of…

A: Given : Mass of KCl dissolved = 8 g Total heat capacity of calorimeter = 6.15 KJ/K And change in…

Q: Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions…

A: The balanced reaction taking place is given as, 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s)…

Q: The white pigment TiO2 is prepared by the reaction of titanium tetrachloride, TiCl4, with water…

A:

Q: A calorimeter contains 23.0 mL of water at 14.5 °C . When 2.20 g of X (a substance with a molar mass…

A:

Q: 5.114 A 3.52-g sample of ammonium nitrate (NH4NO3)was added to 80.0 mL of water in a…

A: Given that : Mass of ammonium nitrate = 3.52g Mass of water = 80.0mL = 80.0g Change in temperature…

Q: When a 7.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of…

A:

Q: When a 4.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of…

A: Given,4.00 g sample of KBrTotal heat capacity of 3.04 kJ K-1.The temperature decreased by 0.220…

Q: What quantity of heat (in kJ) will be released if 1.20 mol of SrO is mixed with 0.911 mol of CO2 in…

A: Given: The number of moles of SrO (Strontium oxide) is 1.20 mol The number of moles of CO2 (carbon…

Q: The following thermochemical equation is for the reaction of tetraphosphorus decaoxide(s) with…

A:

Q: When 0.0700 moles of metal "X" is allowed to completely react with 200 mL of aqueous HCI, the…

A: Given data,Moles of Metal=0.070molesVolume of HCl=200mL∆T=42.9-25=17.9oCHeat capacity of…

Q: Many portable gas heaters and grills use propane, C3H$(g). Using enthalpies of formation, calculate…

A: The standard enthalpy of reaction is the enthalpy change that occurs in a system when matter is…

Q: The following thermochemical equation is for the reaction of tetraphosphorus decaoxide(s) with…

A: 1 mol of tetraphosphorus decaoxide (P4O10) has produced energy = 453 kJ  Molecular weight of…

Q: A 140.0 g sample of water at 25.0°C is mixed with 100.0 g of a metal at 100.0°C. After thermal…

A: The change in energy of a system is given by,

Q: When a system gives off heat and does not work on its surroundings, delta E is always(

A: According to the First law of thermodynamics,  ∆E = q + W Here, q = Heat released or absorbed.…

Q: The heat of formation of H2SO4 is -909.27 kj/mol. Give the thermochemical equation for the formation…

A: Here we are required to show the formation of aqueous sulphuric acid

Q: What is a standard state? What is the standard enthalpy change for a reaction?

A: Standard state of a material is the reference point  that is used to calculate its properties under…

Q: When 5.03 of solid potassium hydroxide are dissolved in 100.0 mL of distilled water in a coffee-cup…

A:

Q: During an experiment, a student adds 1.23 g Ca0 to 200.0 mL of 0.500 M HCI. The student observes a…

A: Generally the heat released in the reaction is absorbed by the solution and raises the temperature…

Q: Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently…

A: Enthalpy change for the reaction recovering1.23 mol Cu is determined as follows,

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A:

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A:

Q: The highly exothermic thermite reaction, in which aluminum reduces iron(III) oxide to elemental…

A:

Q: When salt (NaCI) is dissolved in water, the molar enthalpy of solution (AHsol) is +3.9kJ/mol. If 40g…

A:

Q: Calculate the energy produced when 5.0 mol of CO2 are produced on the basis of the following…

A:

Q: When 1 mole of H₂S(g) reacts with H₂O(1) to form H₂(g) and SO₂(g) according to the following…

A:

Q: The value of AH° for the reaction below is 128.1 kJ CH ,OH CO2es + 2H, (1) 2(g) 2(g) How may kJ of…

A: Enthalpy is thermodynamic property which is extensive in nature

Q: In your Heat of Neutralization experiment, you will mix 25.0 mL of 1.0 M NaOH(aq) with 25.0 mL of…

A: Heat if neutralisation is the heat released during acid base neutralisation reaction.  When HCl…

Q: When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of…

A: Delta E = q + w  where Delta E = change in internal energy  q = heat , w = workdone

Q: The standard enthalpy change for the following reaction is -92.2 kJ at 298 K. N2(g) + 3 H2(g)→2…

A: standard enthalpy change for the reaction is given as, ΔHrxn = -92.2 KJ  Since the enthalpy change…

Q: Instant hot packs contain a solid and a pouch of water. When the pack is squeezed, the pouch breaks…

A: The reaction is given below.LiCl (s)  -->  Li+(aq) + Cl−(aq)         ΔH=  −36.9kJHeat of reaction…

Q: During an experiment, a student adds 1.05 g of calcium metal to 200.0 mL of 0.75 M HCI. The student…

A:

Q: The oxidation of glucose, C6H12O6(s), is described by the following thermochemical equation:…

A:

Q: 48.2 mL of a solution of HCl is combined with 110.7 mL of 1.35 M NaOH in a calorimeter. The reaction…

A: Given: Volume of HCl solution = 48.2 mL = 0.0482 L                               (Since 1 L = 1000…

Q: Calcium carbonate can be decomposed upon applying heat with the following equation CaCO3(s)  →…

A: Calcium carbonate can be decomposed upon applying heat with the following equation: CaCO3(s)  →…

Q: If you have a reaction that occurs in aqueous solution, and raises the temperature of 15.9 g of…

A: As the reaction is exothermic , it liberates heat  which rises the temperature of water so sign of…

Q: Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently…

A: Given:The balanced chemical equation:CuO(s)+CO(g)---->Cu(s)+CO2​(g)ΔH° f,CuO is = –155 kJ/molT =…

Q: calculate the heat (in J) of the reaction if 50.0 mL of HCl is added to 50.0 mL of NaOH in a…

A: When an acid and base react to form a salt and water and heat evolved in resultant solution is…

Q: The standard molar enthalpy formation of ammonia, NH3(g) is -45.92 kJ. 1/2 N2(g) + 3/2 H2(g) ==>…

A:

Q: When 40.0 mL of 0.200 M HCI at 21.5°C is added to 40.0 mL of 0.200 M NaOH also at 21.5°C in a…

A: The reaction taking place in calorimeter : HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(I) Volume of HCl=40.ml…

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A: Interpretation - In the given above all the reactions , here we have to calculate the ∆Ho for the…

Q: When a 6.50 g sample of solid NaOH dissolves in 100.0g of water in a coffee-cup calorimeter, the…

A: Given information: Mass of sample = 6.50 g Mass of water = 100.0 g Initial temperature = 21.6 °C…

Q: Iron can be extracted from the iron(III) oxide found in iron ores (such as haematite) via an…

A: Since Carbon is in excess so all the fe2o3 will be converted into Fe so using the stoichiometric…

Q: In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by…

A:

Q: When a 6.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of…

A: First, we will calculate the enthalpy change and then convert that heat into a molar quantity.  ΔH =…

Q: When methanol, CH, OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A: