Explain the difference between the change in internal energy and the change in enthalpy of a chemical or physical process.

Q: Which of the following conditions for q and w represent a system gaining heat from the surroundings…

A: Endothermic reaction is a reaction where heat is absorbed by the system from the surroundings.

Q: A gas expands and does 256 J of work on its surroundings. At the same time it absorbs 220 J of heat…

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Q: A piston compresses the air in the cylinder by doing 84J of work on the air. As a result, the air…

A: Given,  What is change in internal energy = ΔU = ?

Q: The value of ∆E for a system that gains 115kJ of work from the surroundings and loses 79 kJ of heat…

A: The value of ∆E for a system that gains 115kJ of work from the surroundings and loses 79 kJ of heat…

Q: Define the terms (a) standard reaction enthalpy. (b) standard enthalpy of combustion. (c) standard…

A: (a) Standard enthalpy of the reaction: The heat change when the molar quantities of reactants as…

Q: a system performs 274.0 Joules of expansion work while absorbing 168.0 joules of heat. how many…

A: According to first law of thermodynamics the relationship between change in internal energy, heat…

Q: An automobile engine provides 545 Joules of work to push the pistons and generates 2395 Joules of…

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Q: When 320 mg of naphthalene, C10H8(s), was burned in a bomb calorimeter, the temperature rose by 3.05…

A: An apparatus used to determine the heat associated with chemical or physical reactions is called a…

Q: . What is the change in internal energy of the system (AU) if 82 kJ of heat energy is absorbed by…

A: According to the first law of thermodynamics, the internal energy is equal to the sum of heat…

Q: During a certain chemical reaction 270 J of heat is absorbed by the system and 500 J of work is done…

A: △U = q-w  ∆U = change in internal energy q = heat absorbed by the system w = work is done

Q: Given delta U= q + w, if 13 kJ of heat was absorbed by a system and 9kJ of work was done on the…

A: Internal energy is the total energy of a system that consists of kinetic and potential energies. The…

Q: What is the reletionship between internal energy, heat capacity and enthropy?

A: The amount of energy required to increase the temperature of a substance by one degree celsius is…

Q: Calculate the standard enthalpy of combustion of octanol using its standard enthalpy of formation…

A: Standard enthalpy of formation is the enthalpy change during the formation of one mole of a…

Q: 10. Methyl ethyl ketone, CH,COC,H, (1), is the solvent in most nail polish removers. The standard…

A: The relation to determine the standard change in enthalpy of the reaction is shown below.…

Q: The correct units for the molar heat capacity are: O a) J/mol/°C O b) J/g Oc) J d) mol/°C

A: Molar heat capacity of a substance is the amount of heat required to rise the temperature of one…

Q: Provide a molecular interpretation of heat. How is it different from the equivalent molecular…

A: Given- a molecular interpretation of heat. How is it different from the equivalent molecular…

Q: If 4.771 mol of a material produces 775.5 kJ of heat in a reaction, determine the molar enthalpy for…

A: Molar enthalpy for a reaction if it is an exothermic reaction is the heat produced per 1 mole of the…

Q: Find the change in internal energy when 175 kJ of work is done on a system that evolves 50 kJ of…

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Q: A balloon is inflated with air from an initial volume of 1.44E-1 L to 2.16E0 L against an external…

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Q: For a particular reaction, the system absorbs 6kJ of heat and does 1.5kJ of work on its…

A: Given: The heat absorbed by the system, (Q) = + 6 KJ. The work done, (W) = - 1.5 KJ (Negative as…

Q: If a system absorbs 39 kJ of energy and does 15 kJ of work on the surroundings, calculate the change…

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Q: standard enthalpies c

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Q: What is the change in internal energy of a system that absorbs 600 KJ of heat energy at the same…

A: Given,  a system that absorbs 600 KJ of heat energy at the same time does 450 KJ of work. Therefore,…

Q: Pls help ASAP

A: Enthalpy of Formation :- Enthalpy of formation is the change of enthalpy during the reaction where…

Q: . Calculate the work done on or by a system that absorbs 260 kJ of heat experiences a change in…

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Q: 1. What is the sign of q and w if heat is released from the system and work is done by the…

A: As the heat is released from the system that mean system lost some heat to the surroundings. So, q…

Q: Enthalpy is a state function. What does it mean to be a state function?

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Q: In the situation where a metal is cooling in water, is the internal energy and the enthalpy the same…

A: In case of hot metal-water system, the heat is transferred by the hot metal and this heat absorbed…

Q: What two conditions must be met by a thermochemical equation so that its enthalpy change can be…

A: ∆Hf° is the sign of change in standard enthalpy of formation. Where , "∆" denotes change in enthalpy…

Q: A system absorbs 455 J of energy and at the same time 514 of work was done on it. What is the change…

A: Consider the given information is as follows; Q (amount of heat absorbed) = + 455 J Work done on the…

Q: done against the system during compression of a gas, at the same time 385 J of heat is released from…

A: Answer  Apply 1st law  of thermodynamics  U  =  Q + W

Q: The units for s, the specific heat of the water in the calorimeter, are J/(gK) The units for ΔT can…

A: The specific heat capacity of the water can be defined as the heat required to raise the temperature…

Q: What is the difference between internal energy and enthalpy? Under what  conditions will they become…

A: Answer of this question :- Enthalpy :- it is the heat energy that is being absorbed or evolved…

Q: What is the change in the internal energy of the system if 69 kJ of heat energy is evolved by the…

A: From first law of thermodynamics, Heat added to system = change in internal energy + work done by…

Q: An automobile engine provides 550 joules of work to push the pistons and generates 2120 joules of…

A: ∆W = -550 J (negative sign because the system is doing work) ∆Q = -2120 J (negative because heat is…

Q: What is the change in the internal energy of the system if the surroundings releases 300J of heat…

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Q: An automobile engine provides 646 Joules of work to push the pistons and generates 2258 Joules of…

A: According to the thermodynamics law  ∆U = Q + W Given Work done on the piston = - 646 J Heat…

Q: Calculate the standard molar enthalpy for the complete combustion of liquid ethanol (C2H5OH) using…

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Q: The standard enthalpy of combustion of anthracene is -7163 kJ mol-1. Use this value, along with the…

A: The energy released or the enthalpy generated due to the complete combustion of a particular…

Q: A system has 400J of heat added to it and then subsequently use 160J to do work. What is the change…

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Q: Consider the following four cases: (i) A chemical process in which heat is absorbed, (ii) A change…

A: Given here four cases and we are asked in how many of these cases does the internal energy of the…

Q: Explain the difference between heat capacity and specific heat capacity.

A: The heat capacity of any substance is the amount of heat that is required to increase the…

Q: .125 kJ of energy is added to a system while 104 kJ of work is done by the system. Calculate the…

A: The change in internal energy,ΔU is =  ΔU = q + w q = heat added/removed from the system w = work…

Q: What is the connection between Hess's law and the fact that enthalphy is a state function?

A: Chemical thermodynamics is branch of chemistry in which we deal amount of heat evolved or absorbed…

Q: change in the internal energy

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Q: The standard molar enthalpy of formation for oxygen gas, O2(g), is zero. The enthalpy of formation…

A: Molar enthalpy of formation of a substance is the energy required or released when one mole of a…

Q: the difference between changes in enthalpy and internal energy for the explosion of…

A: Nbh

Q: A change in a system occurs such that 31.1 J of work is done by the surroundings and 22.4 J of heat…

A: Internal energy is the stored energy of the system. From the first law of thermodynamics it is clear…

Q: Determine the change in the internal energy of a system if 5.5 x 107 kJ of heat is removed from it…

A: Given Data- q = -5.5×107 kJ (Heat is removed) W = +2.5×107 kJ (work done on the system)