19. The combustion of hydrogen-oxygen mixtures is used to produce very high temperatures (approxi- mately 2500 °C) needed for certain types of welding operations. Consider the reaction to be 1 -1 H2(g) + O2(g) H2O(g) A,H° = -241.8 kJ mol | 2 What is the quantity of heat evolved, in kilojoules, when a 180 g mixture containing equal parts of H2 and O2 by mass is burned?

Q: In a constant-pressure calorimeter, 50.0 mL of 0.350 M Ba(OH), was added to 50.0 ml. of 0.700 M HCI.…

A:

Q: A water bath is used to heat flammable chemicals in the laboratory while avoiding the risk of…

A: Heat is transferred from the higher temperature to lower temperature is called as the thermal energy…

Q: In a constant-pressure calorimeter, 70.0 mL of 0.340 M Ba(OH), was added to 70.0 mL of 0.680 M HCI.…

A: Total volume = 70.0+70.0 mL = 140 mL Specific heat = 4.184 g/mL Mass = 4.184g/mL × 140 mL = 585.76 g…

Q: In a constant-pressure calorimeter, 50.0 mL of 0.320M Ba(OH), was added to 50.0 mL of 0.640 M HCI.…

A: Given that : Volume of Ba(OH)2 solution = 50.0 mL Concentration of Ba(OH)2 = 0.320 M Volume of HCl…

Q: The standard heat of combustion of propanol, C3H7OH, is 2021 kJ/mol. How much heat would be…

A: Number of moles of any substance can be calculated by dividing the mass of the substance with its…

Q: In a constant-pressure calorimeter, 65.0 mL of 0.800 M H,SO, was added to 65.0 ml. of 0.500 M NaOH.…

A:

Q: In a constant-pressure calorimeter, 60.0 mL of 0.300 M Ba(OH), was added to 60.0 mL of 0.600 M HCI.…

A: We have to predict the ∆H for per mole of water produced .

Q: Propane is a hydrocarbon gas that is commonly used for cooking. The standard enthalpy of combustion…

A:

Q: A calorimeter contains 34.0 mL of water at 14.0 °C . When 2.30 g of X (a substance with a molar mass…

A:

Q: When 1.00 L of 2.00 M Na SO, solution at 30.0°C is added to 2.00 L of 0.750 M Ba(NO), solu- tion at…

A: Calculate the enthaply change per mole of BaSO4 formed.To determine the number of moles of BaSO4…

Q: When 50.00 mL of aqueous HCl was mixed with 50.00 mL of NaOH (in large excess), the temperature of…

A:

Q: During an experiment, a student adds 2.90 g CaO2.90 g CaO to 400.0 mL400.0 mL of 1.500 M HCl1.500 M…

A: The weight of CaO is 2.90 g. The volume of HCl is 400.0 mL. The concentration of HCl is 1.500 M. The…

Q: In a constant-pressure calorimeter, 50.0 mL of 0.320 M Ba(OH), was added to 50.0 mL of 0.640 M HCI.…

A:

Q: If the reaction of 2.5 g of Ca transfers 487 J of heat to a solution in a calorimeter (i.e. qsoln =…

A: Given : Mass of Ca reacting = 2.5 g And amount of heat transferred to the solution = 487 J Atomic…

Q: A reaction occurs according to the following balanced chemical equation: AaBbs + 5 Cc → Áa + 5 BbCc.…

A: Answer: Limiting reagent is the substance that exhausted first in the reaction and decide the yield…

Q: Using the enthalpy of formation data from the appendix in the book, determine the enthalpy for the…

A: Given : Fe2O3(s)+CO(g)→Fe(l)+CO2(g)C2H6+O2→CO(g)+H2O(g) Enthalpy of formation of Fe(l)=36.6 KJ/mole…

Q: In a constant-pressure calorimeter, 50.0 mL of 0.320 M Ba(OH), was added to 50.0 mL of 0.640 M HCI.…

A: The enthalpy change of reaction is calculated with the help of the heat energy absorbed or released…

Q: 3.40

A: a) If the complete equation is multiplied by 2, the value of reaction enthalpy doubles.

Q: The standard enthalpy change for the following reaction is-438 kJ at 298 K. 2 C(s,graphite) + O2(g)…

A: It is given that when 2 moles of solid graphite is reacting with 1 mole of oxygen and 2 moles of…

Q: The oxidation of copper(1) oxide, Cu,O(s), to copper(II) oxide, CuO(s), is an exothermic process. 2…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: A calorimeter contains 30.0 mL of water at 14.0 °C. When 1.70 g of X (a substarice with a molar mass…

A:

Q: A calorimeter contains 20.0 mL of water at 14.5 ∘C . When 1.20 g of X (a substance with a molar mass…

A: From the given information, we can calculate the mass of water (solvent) and the mass of the…

Q: Which of the following is a statement of the first law of thermodynamics? O Ek = 1/2 mv2 O A…

A: Which of the given statement follows the first law of thermodynamics ?

Q: In a constant-pressure calorimeter, 60.0 mL of 0.300 M Ba(OH), was added to 60.0 mL of 0.600 M HCI.…

A: The balanced reaction taking place can be written as, => 2 HCl (aq) + Ba(OH)2 (aq) --------->…

Q: Adding 5.00 g of to 140 g of water in a coffee-cup calorimeter (with stirring to dissolve the salt)…

A: The enthalpy change ΔH is the heat of solution (qrxn) per mole of solute (n). i.e.…

Q: A scientist measures the standard enthalpy change for the following reaction to be -577.0 kJ:…

A: We have given that  H2CO(g) +O2(g)  →  CO2(g)  + H2O(l)                                   ∆Hrxn =…

Q: In a constant-pressure calorimeter, 50.0 mL of 0.340 M Ba(OH), was added to 50.0 mL of 0.680M HCI.…

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: In a constant-pressure calorimeter, 50.0 mL of 0.340 M Ba(OH), was added to 50.0 mL of 0.680 M The…

A:

Q: If 20.0 ml of 3.0 M HCl solution and 20.0 ml of 3.0 M NaOH solution at 215Care mixed in a…

A: Given data  Volume of HCl = 20.0 mL Molarity of HCl = 3.0 M Volume of NaOH = 20.0 mL Molarity of…

Q: For the reaction H,(2) + 0,) → H,0M AH = - 286KJ/mol Calculate the enthalpy change when 2.50 g of…

A:

Q: In a constant-pressure calorimeter, 50.0 mL of 0.340 M Ba(OH), was added to 50.0 mL of 0.680 M HCI.…

A: Given: Concentration of Ba(OH)2 = 0.340 M Volume of Ba(OH)2 solution = 50.0 mL = 0.050 L…

Q: In a bomb calorimeter containing 800 g of water, 0.8221 g of benzoic acid is burned. During this…

A: mass of benzoic acid burned = 0.8221 g heat of combustion of benzoic acid = - 16.72 KJ/g…

Q: A calorimeter contains 30.0 mL of water at 14.0 °C When 1.70 g of X (a substance with a molar mass…

A: Given: Mass of X dissolved = 1.70 g. Molar mass of X = 76.0 g/mol. Initial temperature of solution =…

Q: 1. Given that AH°,( BaSOle) = -1,473 KJ/mol, using the given table, what is standard enthalpy change…

A: Given reaction is :  Ba2+ (aq) + SO42- (aq)---------> BaSO4 (s)  Enthalpy of formation of BaSO4…

Q: The heat of neutralization of HCl (water) with NaOH (water) is -55.84 kJ / mol H2O. If 50.00 mL 1.05…

A: Heat of Neutralization : The heat of neutralization ( or enthalpy of neutralization) is the energy…

Q: If a reaction A → C with an enthalpy of reaction AHẠC can also proceed via two steps: A→ B and - C…

A: This is in agreement with the

Q: 25. From your textbook, find the values for the enthalpy of formation (AHof) for CaCO3(s), CaO(s),…

A: Standard enthalpy of reaction for a chemical reaction is the difference between total molar enthalpy…

Q: In a constant-pressure calorimeter, 70.0 mL of 0.340 M Ba(OH), was added to 70.0 mL of 0.680 M HCI.…

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: When 1 g of material X(molar mass= 40/g/mol) was dissolved in a beaker containing 35.0 ml of 1 M HCI…

A: The question is based on the concept of specific heat capacity.   it is defined as the amount of…

Q: A student reacted 49.3 mL of 1.0 M HCl at 20.0°C with 48.7 mL of 1.5 M NaOH at 22.0°C, after the…

A: When HCl is reacted with NaOH, neutralisation reaction takes place and NaCl and H2O will be…

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: A sample of 0.562 g of carbon is burned in oxygen in a bomb calorimeter, producing carbon dioxide.…

A: Given: Mass of carbon = 0.562 g Initial temperature = 26.74°C Final temperature=27.93°C To find; The…

Q: When 50 mL of 0.400 M aqueous hydrochloric acid (HCI; Molar mass: 36.5 g/mol) is mixed with 50 mL of…

A:

Q: Consider the following reaction:2 CH3OH(g)---->2 CH4(g) + O2(g) ΔH = +252.8 kJ(a) Is this…

A: (a) The given reaction is, The enthalpy change of the given reaction is +252.8 kJ. If the enthalpy…

Q: Carbon occurs in two forms, graphite and diamond. The enthalpyof the combustion of graphite is…

A: Given,

Q: The enthalpy of reaction for the combustion of C to CO2 is -393.5 kJ/mol C, and the enthalpy for the…

A: The reactions given are, 1) C (s) + O2 (g) ------> CO2 (g)                            ΔH = -393.5…

Q: The heat of combustion of ethanol, C,H,OH(I), is-1367 k.J/mol. A batch of sauvignon blanc wine…

A: Given: Heat of combustion of ethanol = -1367 kJ/mol Percent of ethanol by mass       = 12.1% Density…