Unit 10 Q#17 When a 25.0 g sample of ethyl alcohol is burned, how much energy is released as heat? C,H̟OH() + 30,(g) ΔΗΓχη 2 '5 O 2 CO,(g) + 3 H,() = - 1.37 x 103 kJ/mol

Q: A student burns a 0.452 g sample of naphthalene, C10H8, in a bomb calorimeter. The combustion…

A: Given: Mass of naphthalene i.e C10H8 burned = 0.452 g Change in temperature of calorimeter = 2.961…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

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Q: The combustion of 1 mol of glucose, C6H12O6 liberates 2.82 x 103 kJ of heat. If 1.25 g of glucose is…

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Q: 6.111 In a calorimetric experiment, 6.48 g of lithium hy- droxide, LİOH, was dissolved in water. The…

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Q: A 8.22-g sample of solid calcium reacted in excess fluorine gas to give a 16g sample of pure solid…

A: The formula for the enthalpy formation is followign bellow:

Q: 75.0 mL of 1.80 M CuSO 4 solution is mixed with 150 mL of 1.80 M NaOH solution in a coffee cup…

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Q: A 43.9 g spoon made of pure silver (cs = 0.235 J/g o C) at 20.1 o C is used to stir an 8 oz. (240 g)…

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Q: 11. The combustion of 1.00 mole of glucose, CoH12Oe, liberates 1.90 x 10³ kJ of heat. If 2.30 g of…

A: Given data 1.00 mole of glucose, (C6H12O6 ) liberates 1.90 x 103 kJ of heat , Molar combustion heat…

Q: When a 0.740-g sample of trinitrotoluene (TNT), C7H5N206, is burned in a bomb calorineter, the…

A: In a bomb calorimeter, heat of combustion is calculated as: q=mC∆T where m is mass, C is heat…

Q: Under constant-volume conditions the heat of combus- tion of benzoic acid (HC-H;O2) is 26.38 kJ/g. A…

A: Given: Heat of combustion of benzoic acid = 26.38 KJ/g. Initial temperature of calorimeter = 22.25…

Q: 2 X+ Y2Z3 →2 Y+ X2Z3, AH = -325 kJ/mol Given the equation above how many kilojoules of heat are…

A: Given that: 2X + Y2Z3    ----->  2Y + X2Z3     ∆H = -325 kJ/mol

Q: Question attached

A: Given, The combustion reaction of Acetone- C3H6O + 4 O2 → 3 CO2 + 3 H2O  The energy of the above…

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: A chemist carefully measures the amount of heat needed to raise the temperature of a 281.0 mg sample…

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Q: 9. The evaporation of water is endothermic: H2O (1) → H2O (g) AH°rxn = 44.01 kJ/mol What minimum…

A: H°rxn = 44.01 kJ / mol

Q: In the laboratory, a general chemistry student finds that when 0.61 g of MgCl2(s) are dissolved in…

A: For this experiment, Qsol + Qcal + Qrxn = 0Therefore Qrxn = - (Qsol + Qcal)  ΔHdissolution = Qrxn /…

Q: A 0.1694 g sample of benzopenone(C13H10O) is burned in a bomb calorimeter that has a heat capacity…

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Q: 1. A sample of metal with mass 250.0 g is heated to 130.0 ℃ and dropped into 425 g of water at 26.0…

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Q: A piece of metal weighing 5.10 g at a temperature of 48.6°C was placed in a calorimeter in 20.00 mL…

A: Interpretation: A piece of metal weighting 5.10 g at a temperature of 48.6°C was placed in a…

Q: When 23.6 g of calcium chloride, was dissolved in water in a constant-pressure calorimeter, the…

A: Given, Mass of CaCl2 = 23.6 g Initial temperature, Ti = 25.0 oC Final temperature, Tf = 38.7 oC Heat…

Q: A 1.55-g sample of methanol (CH3OH, molar mass = 32.04 g/mol) is burnt in a calorimeter containing…

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Q: 2. What is the heat capacity of 25.0 g of ethyl alcohol if its specific heat is 2.42 J/g C?

A: Given is 25.0 g ethyl alcohol  Heat capacity  = Hc = 2.42 J/g°C Specific heat = ?

Q: If 2.0 KJ of heat energy raises the temperature of a calorimeter containing 45.0 g of water from…

A: 2.0 KJ of heat energy raises the temperature of a calorimeter containing 45.0 g of waterfrom 23.0°C…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.36 kg sample…

A: Given: Mass of sampleC4H6O2=1.36 kg T1=48.6οC T2=61.7οC Q=2.79×104 J To find: Molar heat capacity…

Q: 4-A system suffers an increase in internal energy of 80 J and at the same time has 50 J of work done…

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Q: A 1.36 g sample of a soluble salt dissolves in 23 mL of water in a coffee cup calorimeter.  When the…

A: Given: Mass of sample               = 1.36 g Volume of water              = 23 mL Decrease in…

Q: what quantity of heat energy must have been applied to a block of aluminum weighing 38.4g of the…

A: The total heat required (Q) is determined as follows. Q=mAlcAl∆T ...... (1)

Q: Suppose it took 108 joules of energy to raise a bar of gold from 25.0°C to 29.7°C. Given that the…

A: Q = 108 J  Tf = 29.7°C  Ti = 25.0 °C  m = ?

Q: 8. Titanium reacts with iodine to form titanium (III) iodide, emitting heat. 2Ti(s) + 31,(g)→…

A: Atomic mass of Ti = 47.87 g/mol Atomic mass of I2 = 253.8 g/mol Given thermochemical equation 2Ti(s)…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.04 kg sample…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.19 kg sample…

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Q: 31. When a 0.740-g sample of trinitrotoluene (TNT), C,H;N2O6, is burned in a bomb calorimeter, the…

A: We know that : Heat capacity, C = specific heat, c*mass, m  Or, specific heat, c = C/m = 534/675…

Q: The combustion of 1.00 mol of glucose, CeH1206, liberates 2.82 x 10 kJ of heat. If 1.25 g glucose is…

A: Given that : Heat liberated by 1.00 mol of glucose = 2.82 x 103 kJ The mass of glucose used = 1.25 g…

Q: 1. Why is it necessary to indicate the physical state of all reactants and products when giving the…

A: Enthalpy change of the reaction (ΔHrxn) is the amount of energy change during a chemical reaction.

Q: 4.51 g of octane, C8H18, reacts with excess oxygen in a bomb calorimeter. The heat capacity of the…

A: Given data,The mass of Octane is 4.51gThe heat capacity of the calorimeter is 6.97 kJ/°CThe…

Q: Consider the hypothetical thermochemical equation 3 A + B → 2 C for which AH = 63.1 kJ/mol. Which…

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Q: A gas expands and does work on the surroundings equal to 3.55 L atm. At the same time, it releases…

A: Energy is calculated as follows

Q: The reaction of zinc with hydrochloric acid is represented by the reaction Zn(s) + 2 HCl(aq) ↔ ZnCl…

A: Q = m . s . (T2 - T1) Where, Q = heat absorbed/liberated, m = mass of substance, s = specific heat…

Q: If 50.0 g of benzene, C6H6, at 25.0°C absorbs 2.71 kJ of energy in the form of heat, what is the…

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Q: 8. How much heat energy is required to raise the temperature of 200 g of water (C = 4.184 J/g-°C)…

A: Applying formula Q= mc∆t

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.88 kg sample…

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Q: 31.  When a 0.740-g sample of trinitrotoluene (TNT), C7H5N2O6, is burned in a bomb calorimeter, the…

A: Given: Mass of TNT, m = 0.740 g Initial temperature, Tinitial = 23.4oC Final temperature, Tfinal =…

Q: A2.89 g sample of methanol, CH3OH, is combusted in a bomb calorimeter. The temperature of the…

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Q: 75.0 mL of 1.80 M CUSO 4 solution is mixed with 150 mL of 1.80 M NAOH solution in a coffee cup…

A: 75.0 mL of 1.80 M CuSO 4 solution is mixed with 150 mL of 1.80 M NaOH solution in a coffee cup…

Q: gas expands and does work on the surroundings equal to 6.14 L atm. At the same time, it releases 97…

A:

Q: If 30.0 g H20 at 85.0°C is mixed in a coffee-cup calorimeter with 15.0 g H20 at 20.0°C, what is the…

A: Heat produced or absorbed by water = mass of water x specific heat of water x temperature difference

Q: 4. A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a…

A: • Specific Heat Capacity = qm.∆T J/g• Specific Heat Capacity = q.mm.∆T J/mol.Where,q → heat…

Q: What is the heat energy required to raise the temperature of 5 grams of lead from 10 ̊C to 15 ̊C?

A: q = mc∆T  q is the amount of heat energy required  m is the mass of lead c is the specific heat…