Why not all endothermic processes that do work on the surroundings have the same sign for internal energy

Q: A chemical reaction is run in which 138 Joules of work is done by the system and the internal energy…

A: Work done by the system is negative. So we use W= -138 J  Given: w= - 138J              ∆u= + 14J To…

Q: What are the signs for q and w to represent a system that's doing work on the surroundings, and…

A: “The relationship between heat with other forms of energy like light, mechanical work is studied…

Q: which of the following signs on q and w represent a system that is doing work on the surroundings…

A: Given :-  System is doing work on surrounding  System is gaining heat from surrounding  To…

Q: internal energy of the system is expected to increase/ decrease Sign and symbol Heat (q) is…

A: We need to determine change in internal energy when heat is given, taken, work is done, work is…

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 chemical reaction is run in which 698 Joules of heat are absorbed and the internal energy changes…

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Q: A system gains 617 kJ of heat, resulting in a change in internal energy of the system equal to +161…

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Q: Part A Which statement is true of the internal energy of a system and its surroundings during an…

A: According to the first law of thermodynamics, the energy of the universe remains constant. For a…

Q: What are the signs of q and w if a system absorbs 180 J of heat while expanding (performing work on…

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Q: 6000 joules of energy from the surroundings , what is the change in internal energy of the system it…

A: Internal energy of the thermodynamic system is the energy possessed by the system on account of heat…

Q: 1. ransferred from one system to another spontaneously? What is heat? How does heat differ from…

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Q: Which of the following signs on q and w represent a system that is doing work on the surroundings,…

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Q: The internal energy of a system is always increased by O adding heat to the system having the system…

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Q: which of the following signs on q and w represent a system that is having work done on it by the…

A: • Sign Convention for Work, w i) w is positive, when work is done on the system by the surroundings…

Q: 3) A system moves from state A to state B. When the system takes path 1, 500 Jof heat flow into the…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Which statement/statements are true about thẻ system? a. Heat absorbed by the system (endothermic…

A: System: It is the part or body which contains walls that surround the matter, substances, or…

Q: A chemical reaction is run in which 756 Joules of work is done on the system and the internal energy…

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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: When gasoline burns in an automobile engine, the heat released (325 J) causes the products CO2 and…

A: It is given that 325 J of heat is released when gasoline is burned, and the work done by the gases…

Q: A student runs a reaction in a closed system. During the reaction, 64.7 kJ of heat is released to…

A: According to the first law of thermodynamics, the energy of the universe remains constant. For a…

Q: The work done to compress a gas is 67.0 J. As a result, 29.0 J of heat is given off to the…

A: Given, work done, w = +67.0 J Heat, q = -29.0 J

Q: Calculate the value of internal energy if 670J of heat energy is absorbed by the surrounndings and…

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Q: What are the two main components of the internal energy of a substance? On what are they based?

A: The two main components of the internal energy of a substance has to be given.

Q: Which of the following which is/are true about the internal energy, E?   (i) The total energy of…

A: Internal Energy is defined as energy dissociated with the random, disordered motion of Molecules.

Q: When gasoline burns in an automobile engine, the heat released (325 J) causes the products CO2 and…

A: Given:   The heat released is 325 J. The work done by gas during expansion is 451 J.

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: 1. Which of the following does not result in a change in the internal energy of the system? a. work…

A: Internal energy of the system is not changed in which of the changes: a. Work is done on the system…

Q: When 1 mole of methane (CH4) is burned at constant pressure, 890 kJ of energy is released as heat.…

A: Given, When 1 mole of methane (CH4) is burned at constant pressure, 890 kJ of energy is released as…

Q: A chemical reaction is run in which 551 Joules of heat are absorbed and the internal energy changes…

A: First law of Thermodynamics:                                                            ∆U = q+w…

Q: Which of the following represents a system that is exothermic and is doing work on the surroundings?…

A: Given information,     System is exothermic and doing work on the surroundings

Q: Explain how is enthalpy related to spontaneity of a reaction?

A: The Gibbs free energy is related with enthalpy and entropy. It is shown by the formula given below.

Q: What is the first law of thermodynamics and how does it relate to energy use?<

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Q: Use standard enthalpies of formation to determine ΔHorxnfor: 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l)…

A: Standard enthalpy of formation is defined as the amount of heat absorbed or evolved in the formation…

Q: Which of the following statements is incorrect?   Heat flows from a system into the surroundings…

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Q: Which statement is true of the internal energy of a system and its surroundings during an energy…

A: Given : ΔEsys is -ve.

Q: What is the value of ∆? in a system wherein a car engine that releases heat pushing the piston,…

A: By FLOT Internal energy change for the system ( ∆U): ∆U = ∆q + w      = -325 - 451       = - 776 J

Q: Octane 1C8H182 is a liquid hydrocarbon at room temperature that is a constituent of gasoline.…

A: We have the equation ∆G°=∆H°-T∆S° Where ∆H° is change in enthalpy, ∆G° is change in free energy, T…

Q: If energy flows out of a chemical system and into the surroundings, what is the sign of ΔEsystem?

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Q: Find the change in internal energy when a gas absorbs 28 kJ of heat and has 13 kJ of work done on…

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

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

Q: Consider the following thermochemical equation: Fe2O3 (s) + 2 Al (s) --> 2 Fe (s) + Al2O3 (s)   ∆H…

A: The answer to the following question is given as:

Q: What are the two main components of the internal energy ofa substance? On what are they based?

A: The two main component of internal energy of a substance are: 1) KINETIC ENERGY (K.E.):   the total…

Q: 3. A sytem absorbs 50J of heat during a transformation. Determine the change in internal energy if…

A: The energy of any system which due to the internal activities is known as the internal energy of the…

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: A chemical reaction is run in which 308 Joules of work is done on the system and the internal energy…

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Q: If energy flows into a chemical system and out of the surroundings, what is the sign of ΔEsurr?

A: Given that,  Energy flows into a chemical system and out of the surroundings

Q: A chemical reaction is run in which 633 Joules of work is done on the system and the internal energy…

A: Given: Work done = +633 J ( work is done on the system) Internal energy = +191 J

Q: What effect would leaving the lid off the coffee-cup calorimeter have on the specific heat (higher,…

A: Less specific heat, because only some amount of the heat is transferred to the water whereas the…

Q: Calculate ΔU if 100 kJ of heat energy is absorbed by the system and 30 kJ of work is done on the…

A: Internal energy basically denotes the total energy of the system which is manifested in the form of…