What is the relationship between internal energy (ΔU), andenthalpy (ΔH) for an endothermic process if work is beingperformed on the system by the surroundings ?

Q: What is the value of the work for a system if the work done by the system is it expanding from 8.50…

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Q: Calculate internal energy from heat and work and state the signconventions of these quantities?

A: First law of thermodynamics: According to first law of thermodynamics, total internal energy of…

Q: Sign conventions for Heat (g) and Work (w) : The change in internal energy of a system can be…

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Q: Distinguish between the system and the surroundings in thermodynamics?

A: The difference between the system and the surroundings in thermodynamics has to be given,

Q: The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is…

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Q: . Explain how the sum of heat and work can be a state function,even though heat and work are…

A: Given : Explain how the sum of heat and work can be a state function,even though heat and work are…

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: For the following processes, calculate the change in internal energy of the system expressed in kJ…

A: According to first law of thermodynamics     ∆U =q +w    Where ∆U is change in internal energy,…

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: Which of (i) volume, (ii) heat, (iii) internal energy, (iv) density are state functions?

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Q: What is internal energy? Is internal energy a state function?

A: Energy is the capacity of doing work. It is transferred from one object to other.

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: 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: 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: 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: Why are work, w, and heat, q, not state functions?

A: State function only depends on the final system and on the initial system, it does not depend how we…

Q: a system recieves 425J of heat and delivers 425J of work toits surroundings. what is the change in…

A: Given Heat ( q ) = +425 J ( as heat is received to system ) Work ( w) = +425 J ( as work done by…

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: Calculate the change in internal energy (ΔE) for a system that is giving off 45.0 kJ of heat and is…

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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: Explain the difference between the change in internal energy and the change in enthalpy of a…

A: Change in internal energy (∆U): Internal energy is the sum of Potential energy and the work done of…

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: The internal energy of a gas decreases by 1.65kj when it transfers 1.87kj of energy in the form of…

A: Interpretation: The work done on the gas by the surroundings is to be determined. Concept…

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: 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: A system does 551 kJ of work and loses 216 kJ of heat to the surroundings. What is the change in…

A: Given Data : 1. Work done (W) = -551KJ 2. Heat to the surroundings (Q) = -216 KJ Work done by the…

Q: A system absorbs 1.66E2 kJ of heat and the surroundings do 1.032E2 kJ of work on the system. What is…

A: We have to predict the change in internal energy of system.

Q: If 2.508 mol of a material produces 733.5 kJ of heat in a reaction, determine the molar enthalpy for…

A: Moles of material = 2.508 moles Heat produced in the reaction means this is exothermic reaction.

Q: A system gains 727 kJ727 kJ of heat, resulting in a change in internal energy of the system equal to…

A: As we know; deltaU = Q + W  where delta U is change in internal energy  Q = heat produced  W =…

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: A system does 546 kJ of work and loses 271 kJ of heat to the surroundings. What is the change in…

A: Work (w) = -546 KJ (because work is done on the surrounding, so this is negative) Heat (q) = -271 KJ…

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: Write an equation that expresses the first law of thermodynamics in terms of heat and work.

A: The First Law of Thermodynamics states that energy can be converted from one form to another with…

Q: change in the internal energy

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Q: What is the change in internal energy of the system (ΔU) if 65 kJ of heat energy is evolved by the…

A: As heat energy is evolved by the system, q will be -ve q=-65 kJ As work is done on the system, w…

Q: An automobile engine provides 551 J of work to push the pistons and generates 2250 J of heat that…

A: According to first law of thermodynamics, the change in internal energy of a reaction is equal to…

Q: What is the change in internal energy (in J) of a system that absorbs 0.697 kJ of heat from its…

A: This can be done using first law of thermodynamics.

Q: Calculate the magnitude of q for a system that does 508000 kJ of work on its surroundings and for…

A: Given information,

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: (a) Zero (b) The standard molar enthalpy of combustion of gaseous carbon, (c) The sum of standard…

A: The question is based on the concept of chemical thermodynamics. we have to define standard enthalpy…

Q: What happens to the internal energy of water at reference temperature where enthalpy is zero?

A: In this given system, at reference temperature, the enthalpy is zero. Consider the enthalpy of the…