Calculate the enthalpy of formation of ethyne, CHCH, given that the enthalpies of combustion of carbon, hydrogen and ethyne (in kJ mol") are -394, -286 and -1300 respectively. A +226 B +620 C - 1980 D -2374

Q: Indicate the sign of the enthalpy change, ΔH, in the following processes carried out under…

A: When a reaction takes place, various bonds are formed and broken. Due to this, the energy of…

Q: Calculate the enthalpy change when 5 L of liquid NH3 is burned in air to give N3 (9) and H3O(g).…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: (b) A sample of Magnesium metal weighing 0.14g is combusted in a bomb calorimeter containing 3.0 x…

A: Question is based on the concept of chemical thermodynamics. we have to calculate enthalpy of…

Q: The heats of combustions of carbon and carbon oxide are: C(s) + O2(g) --> CO2(g)       H= -393 kJ…

A: Solution is based on Hell's law i,e., whether the reaction occurs in single step or in certain small…

Q: 2. Determine the standard enthalpy of formation for the following reaction! CH3CI + C12 →CH2C12 +…

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Q: 2. When acetone, CH3COCH3, is completely burned to carbon dioxide and liquid water, at 25°C, Delta…

A: The balanced chemical reaction between acetone and oxygen to produce carbon dioxide and liquid water…

Q: 5. From the following heats of combustion, 3 CH,OH + Oe → COue) +2H,Ou 2(8) AH° =-726.4kJ (1) 2(g) 2…

A: If we reverse any reaction sign will change of ∆H but magnitude remain same  We multipy may equation…

Q: A scientist measures the standard enthalpy change for the following reaction to be -1053.4 kJ :…

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Q: (b) (i) Acetylene, C2H2 is a colourless gas which is widely used as a fuel and a chemical building…

A: Given, ∆Hof of CO2 = - 393.5 KJ mol-1 ∆Hof of H2O = - 393.5 KJ mol-1 ∆Hof of C2H2 = - 393.5 KJ mol-1…

Q: A student wishes to measure the enthalpy change of the reaction of magnesium oxide solid (MgO, M=…

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Q: 9.000 g of Compound X with molecular formula C4H8 are burned in a constant-pressure calorimeter…

A: mass of compound X taken for combustion = 9.000 g  Molar mass of X(C4H8) = 56.107 g/mol Moles of…

Q: A sample of sucrose, C12H22011 weighing 0.1328 g, was burned to completion in a bomb calorimeter at…

A: A sample of sucrose, C12H22O11 weighing 0.1328g was burned to completion in a bomb calorimeter at…

Q: Given the enthalpies of combustion of propane (C3 H8), carbon and hydrogen, C3H3(g) + 502(g) →…

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Q: When 0.7521 g of benzoic acid was burned in a calorimeter containing 1,000. gof water, a temperature…

A: A bomb calorimeter generally consist of water and Some other components  so when temperature is…

Q: 5. Octane, C₂H(1) one of the major components of gasoline, can go through incomplete combustion…

A: C8H18(l) + 11O2(g) -----> 5CO2(g) + 3CO(g) + 9H2O(g) ∆H = -4225.1 KJ/mole

Q: 4. Using ethanol as a fuel reduces greenhouse gas emissions by 40-50% when compared directly to…

A: The combustion reaction of ethanol is given as follows: C2H5OH(l) + 3O2(g) ---------> CO2(g) +…

Q: The standard enthalpy of combustion for cyclohexane (C6H12,l) is -3920 kJ.mol-1 at 25 °C. Use this…

A: Enthalpy of a reaction can be written in terms of enthalpy of formation of reactants and products as…

Q: The heat capacity of a bomb calorimeter was determined by burning 6.79 g methane (energy of…

A: Given: Mass of CH4 combusted = 6.79 g. Heat of combustion of CH4 = -802 KJ/mol. And the change in…

Q: When 0.7521 g of benzoic acid was burned in a calorimeter containing 1,000. g of water, a…

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Q: What is the standard enthalpy change for the combustion of gaeous propylene, C3H6?  C3H6(g) + 9/2 O2…

A: STEP 1: write the balanced chemical equation

Q: The combustion of neopentane is described by the reaction: + H2O (unbalanced) AH = -3456 kJ/mol…

A: Consider the given information is as follows; Mass of neopentane = 100.0 milligrams = 0.1 g…

Q: A scientist measures the standard enthalpy change for the following reaction to be -2905.8 kJ:…

A: Given:- Reaction -> 2C2H6(g) + 7O2(g) -> 4CO2(g) + 6H2O(g)  Standard enthalpy change for given…

Q: A quantity of 1.435 g. of naphthalene (C10H8), a pungent smelling substance used in moth repellents,…

A: Given data,Mass of Naphthalene=1.435gInitial temperature=20.28oCFinal temperature=25.95oCHeat…

Q: Three moles of nitrogen at 30°C are contained in a container of a certain volume. If we ignore the…

A: Given: moles of nitrogen gas = 3 mol Initial temperature (T1) = 30° C Final temperature (T2) = 250°…

Q: 5.000 g of Compound X with molecular formula C,H, are burned in a constant-pressure calorimeter…

A: Introduction: The amount of heat required by a one mole of substance to raise the temperature to a…

Q: Determine the enthalpy change, ΔHrxn, for the combustion reaction shown, using the heats of…

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

Q: A bomb calorimeter has a heat capacity of 675.0 J/°C and contains 925.0 g of water. If the…

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Q: Consider the following equation for the combustion of nonane (CH20). CH200) + 14 Ozie 9 COze + 10…

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Q: 2. Calculate the molar enthalpy of combustion in a reaction where the enthalpy change is -109KJ and…

A: Answer:- This question is answered by using the simple concept of calculation of enthalpy of…

Q: excess oxygen in a bomb calorimeter. The calorimeter, which alone had a heat capacity of 2.67 kJ/oC…

A: Temperature difference (□T ) = 27.95 - 24.32 = 3.63 °c Mole(n) = 1.45 /60 = 0.0242 mol  Using energy…

Q: A scientist measures the standard enthalpy change for the following reaction to be -129.8 kJ :…

A: The given chemical reaction is as follows 4HCl(g) + O2(g)------->2H2O(g) + 2 Cl2(g)

Q: A scientist measures the standard enthalpy change for the following reaction to be -52.7 k) :…

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Q: 9. A 0.5g sample of naphthalene (CioH8) is burned in a bomb calorimeter containing 650ml of water at…

A: Given data: Mass of sample naphthalene=0.500g Mass of water = 650 ml or 650 g Initial temperature T…

Q: 3. A coffee-cup calorimeter is used to determine the heat of reaction for the acid-base…

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Q: A 0.602-g sample of isophthalic acid (C8H604) is burned in a bomb calorimeter and the temperature…

A: Given :  Weight of C8H6O4 = 0.602 g  Initial temperature = 24.8 °C  Final temperature = 27.05 °C…

Q: A student burnt 0.40 g of ethanol using a calorimeter filled with 150 cm³ of water and noted a…

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Q: Given information 4C (s) +3 H2 (g) - The standard enthalpy of formation for H;0 (e) is b k/mol. CHe…

A: By using experiement we can get required equation

Q: Indicate the sign of the enthalpy change, ΔH, in the following processes carried out under…

A: The enthalpy change is defined as the energy change taking place during transformation of one…

Q: The combustion of heptane, C,H16, occurs via the reaction C;H16 (g) + 1102(g)→7CO2(g) + 8H,0(g) with…

A: Enthalpy of combustion: enthalpy of combustion is the change in enthalpy when one mole of a…

Q: The standard molar enthalpy of formation of diborane, B₂H₁ (g), cannot be determined directly…

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Q: 14.Butane is the liquid found in lighter fluid. If it reacts with oxygen, it can undergo a…

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Q: The combustion of propane, C3H3, occurs via the reaction C3 Hs (g) + 502 (g)→3CO2(g) + 4H2O(g) with…

A: To solve this problem we use the enthalpy of formation of given species in the reaction .

Q: Determine the enthalpy change, ΔHrxn, for the combustion reaction shown, using the heats of…

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Q: Calculate the enthalpy of reaction for the combustion of 9.25 g of butane, C4H10, using the…

A: Given data  - Enthalpy of formation - CO2(g) = -394 kJ/mol; H2O(l) = - 286 kJ/mol; C4H10(g) = -484…

Q: 10. The following molar enthalpies of formation are given in kJ/mol: AHP[C;Hs(g)] = -104;…

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Q: The molar heat of combustion of naphthalene (M.W. = 128.17) is –1228.2  kcal/mol. If 0.3000 g of…

A: Given that

Q: In an experiment, a 1.1250 g sample of β-D-fructose (C6H12O6) is burned completely in a bomb…

A: Answer: -2709.88 KJ/mol

Q: 2. Calculate the molar enthalpy of combustion in a reaction where the enthalpy change is -109KJ and…

A: