Les enthalpies standard de formation, à 25.00°C, du méthane (CH4(g)), de l'eau (H2O(l)), et du dioxyde de carbone (CO2(g)) sont respectivement -74.6 kJ/mol, -285.8 kJ/mol, et -393.5 kJ/mol. Quelle est la quantité de chaleur libérée (en kJ) lors de la combustion de 17.83 L de méthane sous une pression constante de 1.000 atm à 25.00°C (N.B., la combustion est la réaction d'une substance avec l'oxygène moléculaire pour produire l'eau et le dioxyde de carbone)?

Q: Calculate the standard enthalpy of formation of NO(g) (in kJ/mol) from the following data. N2(9) + 2…

A: N2(g) + 2O2(g) -------> 2NO2(g).     ∆H0298 = 66.4 kJ 2NO(g)+ O2(g)---------> 2NO2(g).…

Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water…

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Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water…

A: We are given data for two different experiments.  We will use the first experiment to find the heat…

Q: A 2.612-g sample of proline, C3H,NO: (115.13 g/mol) was burned in a bomb calorimeter with excess en.…

A: Solution - According to the question - Given - Mass of water = 1.298 Kg = 1.298  103 g = 1298 g.…

Q: If you said the reaction was exothermic or endothermic, calculate the amount of heat that was…

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Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1100.g of water…

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Q: 5. Calculate the enthalpy of reaction for the following reaction that methanogenic bacteria use to…

A: Answer: Enthalpy of a reaction is always equal to the difference between enthalpy of formation of…

Q: Using the standard formation enthalpies that follow, calculate the standard enthalpy change for this…

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Q: 2 H.O(g) ½ 0. (g) + H.O AH = -241,8 kJ/mol 1. 2. C(s) + 0.(g) → 2 CO.(g) AH9 = -393,5 kJ kJ/mol 3.…

A: If the enthalpy changes ΔH is negative, then reaction will be exothermic. If the enthalpy change ΔH…

Q: What is qH2O? b.) What is qrxn c.) What is ΔHrxn?

A: Given 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature…

Q: Use the following enthalpy data and apply Hess's Law to calculate the formation of NH4Cl(s). 1/2…

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Q: Calculate the total energy (kJ) required to heat a 17.5 g sample of benzene (C&H6) from 0.00 °C to…

A: Given that: molar mass: 78.11 g/mol cs,solid  = 1.51 J/g*°C cs,liquid  = 1.70 J/g*°C cs,gas  = 1.05…

Q: Consider the following chemical reaction and calculate the ΔHrxn using the data provided to the…

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Q: Next, 4.490 g of ethylene (C₂H4) are put into the "bomb" and similarly completely burned in an…

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Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water…

A: Step 1: Given:Mass of water = 1300 g.Initial temperature = 19.00 oC.Final temperature = 41.83…

Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water…

A: C2H5OH + 3O2 = 2CO2 + 3H2O 1) The above reaction is…

Q: 3.) An iron bar with a mass of 869 g cools from 94.0 °C to 5.0 °C. Calculate the heat released (in…

A: Information of question

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: Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or…

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Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1100. g of water…

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Q: A 800 mg sample of magnesium was burned in an oxygen bomb calorimeter. The total heat capacity of…

A: Given,  Mass of Mg = 800 mg  Total heat capacity = 5760 J/K  Enthalpy of combustion of Mg = -602.0…

Q: A chemist measures the enthalpy change AH during the following reaction: C6H(1) + 3H₂(g) →3 C₂H₂(g)…

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Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water…

A: Given that: Mass of water = 1300 g Mass of benzoic acid = 5.500 g Temperature change for the…

Q: 1. Determine the standard enthalpy of formation (in kJ/mol) of methanol from its elements. C(graph)…

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Q: The enthalpy of formation for H2O(g), CO2(g), and C2H5OH(l), in kJ/mol, are given as follows:…

A: Given: The reaction is as follows: C2H5OH(l)  +  3O2(g)  -->  2CO2(g)  +  3H2O(g) Hfo[H2O(g)] =…

Q: Use this information, and any other information you need from the ALEKS Data resource, to answer the…

A: Mass of water in bomb calorimeter=1200 gMass of ethylene=4.290 gMolar mass of ethylene=25…

Q: 2 NO(g) - N2(g) + O2(g) 4,H° = -181 kJ/mol-rxn What is the enthalpy change that occurs when 3.00 g…

A: Given  Reaction  2NO(g)  -----> N2(g)  +  O2(g)        ∆rH°  = -181 KJ/mol Enthalpy Changes when…

Q: Note for advanced students: it's possible the student did not do these experiments sufficiently…

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Q: How much energy is required to change the temperature of 1.50 L of water from 25.0 °C to 100.0 °C?…

A: Given : volume of water = 1.5 L = 1500 mL                                                  ( since 1…

Q: ,4.580g of acetaldehyde C2H4O are put into the "bomb" and similarly completely burned in an excess…

A: The heat gained or absorbed by a substance in a calorimeter is calculated using the following…

Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water…

A: a.) Exothermic reaction is that reaction in which heat is released and endothermic reaction is that…

Q: A chemist measures the enthalpy change AH during the following reaction: Sg(s) + 24 F₂(g) →8 SF 6(g)…

A: To solve this problem we have to use the given thermochemical reaction .

Q: Calculate the enthalpy change per mole of Fe2O3 reacted.

A: when energy is released from system to surrounding in form of heat is known as exothermic reaction.…

Q: The combustion of 0.1564 g benzoic acid increases the temperature of a bomb calorimeter by 2.53°C.…

A: Since the energy released by the combustion of benzoic acid is 26.42 KJ/g, therefore the energy…

Q: 5. If 3.00 mL of water at 40.0 °C was added to a calorimeter containing 2.00 ml. of water at 20.0 °C…

A: To calculate the amount of heat gained by the calorimeter, we can use the equation: q = mcΔT where q…

Q: Calculate the enthalpy of the following reaction using the data in the table. 2A +2B + 5C 4D + 4E…

A: Hess's law  states that the amount of heat evolved or absorbed in a process is independent of the…

Q: A 981.8 g sample of bismuth goes through a temperature change of +46.75 °C while absorbing 784.6…

A: 1. Given :-  Mass of sample of Bi = 981.8 g  Temperature change i.e. ∆T = +46.75°C  Amount of heat…

Q: A scientist measures the standard enthalpy change for the following reaction to be -34.0 kJ: C₂H4…

A: ΔH° = -34.0 kJ ΔH°f (CH3CH2OH) = -235.1 kJ/mol ΔH°f (C2H4) = -52.3 kJ/mol

Q: How many kilojoules (to 3 s.f.) of energy is required to heat 90.0 g H₂O (5.00 moles) from solid ice…

A: we will calculate required heat by three steps------1. Heat required for temperature change of ice…

Q: What is AE for the com

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Q: The enthalpy of formation for H2O(g), CO2(g), and C2H5OH(l), in kJ/mol, are given as follows:…

A: Enthalpy of formation is the heat change take place for the formation of one mole of substance from…

Q: 6. When a 3.80 g sample of liquid octane (C;H18) burns in a bomb calorimeter, the temperature of the…

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Q: Which equation represents the standard enthalpy change of formation of soc A. O Na(s) + 0.5C|2(9) →…

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Q: 9. For the information NHƯg) H₂(g) -2H(g) N₂(g) 2N(g) AH" -1172.8 kJ AH-435.930 kJ AH-945.408 kJ the…

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Q: 10. Calculate the standard enthalpy of formation of N₂O5 from the following data: kJ mol kJ "mol kJ…

A: Standard enthalpy of formation: It is the enthalpy change when 1 mole of a compound is formed from…

Q: 1. What is the enthalpy of formation, AHP, for the substance E6L14 shown in the reaction above? AHP…

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