The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is 5084.3 kJ. If the change in enthalpy is 5074.1 kJ, how much work is done during the combustion?

Q: Determine ∆U in a chemical system that absorbs 50.5 kJ of heat from the surroundings and performs…

A: According to the first law of thermodynamics,

Q: When 2.920 g sample of benzoic acid (C6H6O2) absorbs 22.8 J of heat, its temperature increases by…

A: The amount of heat required to increase the temperature of a given quantity of the substance by one…

Q: A sample of gas is placed into an enclosed cylinder and fitted with a movable piston. Calculate the…

A: Work done by the gas is given by W = -P × ∆V W = - P × (V2 - V1) W = work done P = external pressure…

Q: It takes 57.5 J of energy to raise the temperature of 115.4 g of mercury from 23.61°C to 27.17°C.…

A: We know that the energy supplied is equal to the internal energy change of the molecules.

Q: sample of flammable liquid is placed into an enclosed cylinder which is then fitted with a movable…

A: If all the relaese energy convert into work then work should be equal to the release energy. W= -q…

Q: A 0.756g sample of liquid ethanol, C2H5OH, is burned in a bomb calorimeter that hold 915 g water.…

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Q: How much work (in J) is involved in a chemical reaction if the volume decreases from 4.00 to 1.26 L…

A: Given:Volume V1 = 4.00 LVolume V2= 1.26 Lpressure = 0.857 atm

Q: The value ΔH0 of for the reaction 2Ba(s) + O2(g)→ 2BaO(s) is -1107 kJ. Determine the amount of…

A: First, calculate moles of BaO(s) No of moles of BaO(s) = Mass/Molar mass = 5.75g/(153.33g/mol) =…

Q: A sample of hydrogen gas is kept in a container with a piston. Recall that 1 L atm = 101.3 J. If the…

A: Given data :  Volume (V1) = 1.0 L  Volume ( V2) = 4.5 L  To calculate : work done Against a vacuum…

Q: An 80.0 g sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was…

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Q: In a calorimetry experiment, a 22.5 gram metal object was heated to 64.23oC. It was placed into a…

A:

Q: How much work is done when a piston is compressed from 9.51 L to 4.34 L under constant atmospheric…

A: Given  A piston is compressed from 9.51 L to 4.34 L  so  V1 = 9.51 L V2 = 4.34 L piston compressed…

Q: Describe the relationship of enthalpy, work, and internal energy. Calculate the ∆U for these…

A: First law of thermodynamics state that energy can neither be created nor be destroyed but can be…

Q: One tablespoon of cookie dough has a mass of 13.02 g13.02 g. It is combusted in a calorimeter whose…

A:

Q: 6. When a 1.0 g sample of acetylene was burned in a bomb calorimeter, the temperature increased by…

A: The number of moles of acetylene is calculated as shown below where m is the given mass of acetylene…

Q: An 80.0 g sample of a gas was heated from 25 "C to 225 "C. During this process, 346 J of work was…

A:

Q: What is the work performed when a gas expands from 0.66 L to 2.33 L against an external pressure of…

A: We have been given initial volume, final volume and external pressure We have been asked the work…

Q: A system absorbs 21.6 kJ of heat while performing 6.9 kj of work on the surroundings. If the initial…

A:

Q: A certain system absorbs 0.100 kJ of heat and has 0.800 kJ of work performed on it. What is the…

A: The formula for the calculation of internal energy is : internal energy(ΔE) = heat(q) + work(w)

Q: When a solid dissolves in water, the solution may become hotter or colder. The dissolution enthalpy…

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Q: Calculate the overall change in internal energy (ΔE) for a system that absorbs 31.5 joules of heat…

A:

Q: A gas is compressed in a cylinder from a volume of 30.0 L to 18.0 L by a constant pressure of 1.32…

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Q: 10.00 mL of 1.00 M HCl solution i mperature rises from 22.45 °C to 23 same as that of 125 g of…

A:

Q: During a breath, the average human lung expands by about .50 L. If this expansion occurs against an…

A: Work in thermodynamics is the amount of energy that is transferred from one system to another system…

Q: Calculate the change in internal energy (ΔU) for a system that is giving off 25.0 kJ of heat and is…

A: The first law of thermodynamics states that the change in internal energy of a system equals the net…

Q: A 2.673 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A: Tf = 28.80°C  Ti = 25.03° C ΔT = Tf - Ti = 28.80° C - 25.03 ° C                                =…

Q: A 3.623 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A: Given, The weight of sample is 3.623 g. The given temperature values are 23.53 ˚C and 30.40 ˚C. The…

Q: Calculate the work, w, done in kJ when a gas contracts from 40.0 L to 5.0 L against a constant…

A:

Q: Consider an ideal gas enclosed in a 1.00 L container at an internal pressure of 24.0 atm. Calculate…

A: Given that : The internal pressure of the gas = 24.0 atm The initial volume of the container = 1.00…

Q: 1. When gasoline burns in an automobile engine, the heat released (325 J) causes the products CO,…

A:

Q: Consider the following cyclic process carried out in two steps on a gas. Step 1: Step 2: 48 J of…

A: Given:The given process is cyclicStep 1: 48 J of heat is added to the gas12 J of expansion work is…

Q: A 3.971 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A: The total heat can be calculated as,