The standard enthalpy of formation for one mole of methanol (CH₃OH) is -239 kJ. What is this value in kcal (1 cal = 4.18 J)?

Q: The formation of rust (Fe2O3) from solid iron and oxygen gas releases -1.7  103 kJ. 4 Fe(s) + 3…

A: The question is about to calculate the mass of rust formed when 150 kcal are released -

Q: A 0.500-g sample of KCl is added to 50.0 g of water in a calorimeter (as shown). If the temperature…

A: In case of a calorimeter we can relate the heat change of a system to the product of the mass of the…

Q: Ethanol, C₂H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel…

A: In a combustion reaction of an organic compound, it reacts with oxygen to form carbon dioxide and…

Q: The following equation shows the conversion of aluminum oxide to aluminum. How much energy (in kcal)…

A: We have given that a balance chemical equation of Al2O3 to Al as follow                  2 Al2O3 (s)…

Q: Which of the following equations is an exothermic reaction?   a H2 (g) + ½ O2 (g) → H2O (l) ΔH =…

A: Exothermic reaction Reaction in which Energy is released so it is exothermic reaction.

Q: Ethanol, C₂H6 O, is most often blended with gasoline - usually as a 10 percent mix - to create a…

A:

Q: The energy diagram shown represents the chemical reaction between solid ammonium c octahydrate:…

A: The heat absorbed is to be calculated

Q: The reaction for the combustion of propane is C₂H₂(g) +50₂(g) → 3 CO₂(g) + 4H₂O(1) heat: ΔΗ =…

A: Given combustion reaction; C3H8(g) + 5O2(g) ---> 3CO2(g) + 4H2O(l) delta(H) = -526.3 kcal/mole…

Q: When 1.3 g of KClO3 was added to 151.1 g of water in a calorimeter, the temperature dropped by 0.588…

A: Given, Mass of KClO3= 1.3g Mass of water= 151.1g Temperature dropped(dT)=0.588°C  The heat capacity…

Q: 1.The combustion of methane gas, the principal constituent of natural gas, is represented by the…

A: Recall the given reaction CH4g + 2 O2g → CO2g + 2 H2Ol     ,  ∆H°=-890.3 kJ We have to find the mass…

Q: Ethanol, C₂H6 O, is most often blended with gasoline - usually as a 10 percent mix - to create a…

A: Mass of 1 mole of compound = Molar mass  Molar mass of a compound = Sum of Molar mass of each of its…

Q: 9.69 x 10^6 J = ? Kcal

A: Given :-  energy = 9.69 x 106 J  To convert :-  The above energy in Kcal

Q: Hydrocarbons, compounds containing only carbon and hydrogen, are important in fuels. The heat of…

A: Cyclopentane, C5H10 reacts with oxygen to form carbon dioxide and water.

Q: How many Joules are there in 54.0 kcal? (1 cal = 4.184 J)

A: One calories is equal to 4.184 joule.                1 kcal = 1000 cal.…

Q: The heat of reaction for the combustion of hexane, C6H14, is 995.0 kcal/mol. What is the heat of…

A: The heat change in a particular reaction is known as enthalpy change (∆H). The endothermic reactions…

Q: 2 CH3OH) +3 O2(g) → 2 CO2) + 4 H20) + 347 kcal Calculate the amount of heat in kcal & kJ released…

A: Given : The reaction equation is as follows. 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(l) + 347 kcal Mass…

Q: When hydrogen and oxygen are burned to produce water, heat is produced at the rate of 58 kcal/mole…

A: Given: Heat produced per mole of water = 58 Kcal/mol of water. And 1 mole of water contains = 6.02 ×…

Q: Ethanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel…

A:

Q: In winemaking, microorganisms break down the sugar in grapes into ethanol (grain alcohol) and carbon…

A: The molar mass of ethanol = 46 g  2 moles of ethanol , which weights 92.16 g produces 16.6 kcal  of…

Q: When 3.02 g of NH4Cl  is dissolved in enough water to make 20.05 mL of solution, the temperature…

A: To find enthalpy change, first find q of reaction by using formula of q. Then divide the calculated…

Q: is 2 NO2(g)   → N2O4(g) + 19 kcal a exothermic or endothermic

A: In simple words,  Endothermic reaction - when heat is absorbed , the reaction is endothermic.…

Q: Ethanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel…

A: Given: Heat of combustion of ethanol =  326.7 kcal/mol. Mass of 2-Methylhexane = 446 grams Molar…

Q: Perform the conversions between energy units. 791 kJ=                                             J…

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Q: The aluminum cup inside your calorimeter weighs 41.55 g. You add 59.21 g of 1.0 M acetic acid…

A:

Q: rogen sulfide, H2S, is produced during decomposition of organic matter. When 0.4190 mo H2S burns to…

A: Given, Heat released = -217.0 KJ

Q: Ethanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel…

A: Since heat of combustion is the amount of energy released when 1 mole of reactant is com-busting…

Q: C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called…

A: When one mole of a compound is burned completely in presence of oxygen, then the heat released…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCI(aq) → 2 MCI, (aq) +…

A: Given- 2 M (s) + 6 HCl (aq)  →  2 MCl3 (aq) + 3 H2 (g)       ∆H1 = -931.0 kJ HCl (g) → HCl (aq)…

Q: Perform the conversions between energy units. 633 kJ = 2325 kcal %3D kJ 9.01 x 10 J = kcal

A:

Q: Ethanol, C,H0, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel…

A: Heat of Combustion of 2 methyl heptane is  =1.306 × 103  kcal mol-1  ,  that means on complete…

Q: Classify each as exothermic or endothermic AND explain why.   N2O4(g) + 19 kcal →  2 NO2(g)…

A: Exothermic process:- The process which produces energy                                     that…

Q: 500.0 mL of 0.100 mol·L HCl(aq) was added to a high quality insulated calorimeter containing 500.0…

A:

Q: A    =   2 B        Δ H = + 24 kcal   Is the above reaction exothermic or endothermic?   Is heat…

A:

Q: When CH4(g) reacts with H2O(g) to form H2(g) and CO(g) , 49.2 kcal of energy are absorbed for each…

A: The reactants are CH4 (g) and H2O (g)  And the products are H2 (g) and CO (g)  hence the reaction…

Q: Vanillin is a natural constituent of vanilla that is also manufactured for use in artificial vanilla…

A: Given the mass of vanillin taken for combustion = 1.013 g Since the temperature of the calorimeter…

Q: For the reaction: 2 C020) + 4 H20w + 347 kcal O 2(g) -> 2 CH30H) +3 0, Calculate the amount of heat…

A: When methanol reacts with oxygen or burns with oxygen releases a lot of energy and gives water and…

Q: When NO(g) reacts with O2 (g) according to the following reaction, 57.1 kJ of energy are evolved for…

A: