Calculate the change in the internal energy (AU) of a gas that absorbs heat of 140 J from the surrounding and does an expansion work of 85 J on the surrounding. O A) -550 kJ O B) +55 J OC) -55 kJ OD) +550 J O E) +55 kJ

Q: Using the equations H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol C (s) + 2 F2 (g) → CF4 (g) AH° =…

A: Hess's law of constant heat summation says that for a reaction occurring in multiple steps, the net…

Q: When 15.0 mL of 3.00 M NaOH was mixed in a calorimeter with 13.0 mL of 3.00 M HCl, both initially at…

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Q: 3. A 1 g sample of octane (C3H18) is burned in a bomb calorimeter containing 1200 grams of water at…

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Q: When 15.0 mL of 3.00 M NaOH was mixed in a calorimeter with 13.0 mL of 3.00 M HCl, both initially at…

A: Given : Concentration of NaOH = 3.00 M Concentration of HCl = 3.00 M Volume of NaOH solution = 15.0.…

Q: A 0.836 g of CH14 are burned in a constant volume calorimeter, the calorimeter temperature rises…

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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: The heat capacity of a calorimeter is calibrated by adding 3.00 mL of water at 40.0°C to the…

A: Heat is released by water at a higher temperature and absorbed by water at a lower temperature.…

Q: Determine the enthalpy of reaction (DHxn) in kJ/ mol H20 formed if an acid/base neutralization if…

A: Given: Molarity of acid, HCl = 1.108 M Molarity of base, NaOH = 1.205 M Rise in temperature = 6.850C…

Q: 164. The specific heat capacity c of a metal is approximately related to its molar mass M follows:…

A: The specific heat capacity of a metal is related to its molar mass as follows,

Q: The heat capacity of a calorimeter is calibrated by adding 3.00 mL of water at 40 to the calorimeter…

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Q: Hydrazine and 1,1-dimethylhydrazine both react spontaneously with O2 and can be used as rocket…

A: b) The reaction given is  Since for any reaction, the Standard enthalpy change, ΔH0 is given by…

Q: Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics…

A: Given data,ΔHcomb for dimethyl phthalate is –4685 kJ/molThe mass of the dimethyl phthalate is 1.10…

Q: Calcium reacts with HCl according to the following reaction: Ca(s) + 2HCl(aq) -> CaCl2(aq) + H2(g)…

A: Given: Mass of calcium is 2.5 g. qsoln is +487 J. Introduction: The enthalpy of the reaction is the…

Q: Calculate the heat capacity of the calorimeter. If when mixing 25.00 mL of 0.70 M NaOH and 50.00 mL…

A: Given: Vol of NaOH =  25.00ml Vol of HCl = 50.00ml Volume of solution = 75.00ml So, mass of solution…

Q: Compounds of boron and hydrogen are remarkable for their unusual bonding and also for their…

A: The given reaction is, ΔHrxn = −755.4 kJ   Total 7.313 Kg = 7313 g B2H6 is reacted.   molar mass of…

Q: Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics…

A: heat of combustion is the heat released during combustion process

Q: Fructose (C6H12O6, MW = 180.18 g/mol) undergoes combustion as follows: C6H12O6 + 6 O2 → 6 CO2 + 6…

A: The mass of fructose is 5.00 g. The heat capacity of bomb calorimeter is 29.7 kJ/K. The increase in…

Q: When 320 mg of naphthalene, C10H8(s), was burned in a bomb calorimeter (write the reaction and…

A: In bomb calorimeter, we use the following  formula, q = -C.∆T=> -∆U = C.∆T  C=  heat capacity of…

Q: 9. A diamond weighing 310 mg requires 2.38 J to raise its temperature from 23.4°C to 38.7°C. A.…

A: Specific heat capacity of the elements are given by ratio of amount of heat absorbed to the mass of…

Q: From the following heats of combustion, CH3OH(1) + 02(g) → CO;(g) + 2H,O(1) AH =-726.4 kJ/mol rxn…

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Q: I. Give the thermochemical data below, find the change in enthalpy for the following reactions: NO…

A: ∆H of a reaction is the amount of heat released in the reaction.

Q: Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics…

A: Heat absorbed by calorimeter=Ccaloimeter(Tf-Ti)Molar mass of  dimethylphthalate (C10H10O4)=191.184…

Q: Thermochemistry - Measurements in constant pressure calorimeter The calculation of the error in the…

A: The device which is used to determine the enthalpy change of a chemical reaction is known as…

Q: Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics…

A: Molecular formula of dimethylphthalate  = C10H10O4 Molecular weight of dimethylphthalate C10H10O4 =…

Q: Calculate the energy needed to heat 1.98 mol of aluminium oxide from 34.1 °C to 58.7 °C.

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Q: Use constant-volume calorimetry to determine energy change. A 0.879-g sample of adipic acid…

A: Under constant-volume calorimeter the energy change is given by Q = Ccalorimeter × (T2-T1)

Q: 1. a. (i) The work done to compress a gas is 85.0 J. As a result, 21.0 J of heat is given off to the…

A: Given that w = 85.0 j (it is positive because work done on gass)  q = - 21.0 j (it is negative…

Q: 7. The heat evolved from the combustion of 0.94g ethanol raises the temperature of 250 cm water…

A: All the details are explained in handwritten solution.

Q: 7. In a calorimeter, 50.00 mL of 2.50 M NaOH was combined with 50.00 mL of 2.25 M HCI to form a…

A: Heat absorbed by a system = mass of the system x heat capacity x change in temperature

Q: Determine the enthalpy of reaction (DH) in kJ/ mol H,O formed if an acid/base neutralization if 11…

A:

Q: A 25.95 g sample of methanol at 35.60 °C is added to a 38.65 g sample of ethanol at 24.70 °C in a…

A: The first law of thermodynamics states  that the energy given off by a system must be absorbed by…

Q: 2) A 0.500 g sample of Trinitrotoluene (C7H$N2O6) is burned in a bomb calorimeter containing 610…

A: Given: Sample weight = 0.5 g Heat of combustion (q) = 3374 kJ/mol Weight of water = 610 g Initial…

Q: Chaeyoung wants to study the heat transfer between a 50 g of heated block of iron (cFe = 0.449 J/g…

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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: To calibrate a calorimeter, 10.0 ml of 1.0 M NaOH and 5.0 ml of 1.0 M HCl was used in a calorimetry…

A: Calorimeter is used to calculate heat of reactions.

Q: The combustion of naphthalene (C10H8), which releases 5150.1 kJ/mol, is often used to calibrate…

A: When a combustion process takes place, a substance is burnt in the presence of oxygen molecule…

Q: Determine the enthalpy of reaction (DHpxn) in kJ/ mol H20 formed if an acid/base neutralization if…

A: We have to predict the enthalpy of the reaction.

Q: the heat capacity at constant pressure for one mole of ideal gas . has linear three atoms molecules…

A:

Q: 6, A 0.213 g sample of an organic compound with a molar mass of 386.0 g/mol was burned in the bomb…

A: D) -1.9×104 KJ/mol Given that, Mass of organic sample = 0.213 g Moles of organic sample n = 0.213…

Q: The heat capacity of silicon dioxide (SiO2, 60.1 g mol-1), is 0.732 J g¬ K-1. Calculate the energy…

A: The heat capacity of SiO2 is = 0.732 J g-1 K-1 The molar mass of SiO2 is =60.1 g.mol-1 The moles of…

Q: Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics…

A:

Q: Which of the following would have a positive ΔH? Select one: a. Combustion of methane b.…

A: Combustion of methane , dissolution of NaOH and formation of N2 are exothermic process.accompanied…

Q: . Adding 2.00g Mg metal to 95.0 ml HCL in a coffee cup calorimeter leads to an increase of 9.2…

A: Considering the density of HCl solution to be 1g/mL that is the same as the density of water, the…

Q: At constant volume, the heat of combustion of a particular compou (molar mass = 162.47 g/mol) was…

A:

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: 1. 40.0 g of ice cubes at 0.0°C are combined with 150. g of liquid water at 20.0°C in a coffee cup…

A: Given: Mass of ice cubes added = 40.0 g. Mass of hot water used = 150 g. Initial temperature of hot…

Q: The first step in the production of nitric acid from ammonia involves the oxidation of NH3. 4…

A:

Q: Calculate the amount of water (in grams) contained in a bomb calorimeter when 23027 J of heat was…

A: Given: Heat released q = 23027 J Cwater = 4.184 J/goC Calorimeter constant = 1.5 J/oC ∆T=…