What is the change in internal energy of the system?

Q: what is the heat evolved

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Q: A heated gas expands and presses on a piston. In this example, work is done: A) By the gas on the…

A: If the gas is heated, it will expand and push the piston up, thereby doing work on thepiston

Q: An automobile engine provides 519 Joules of work to push the pistons. In this process the internal…

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

Q: Change in internal energy is a state function while work is not, why?

A: Change in internal energy is a state function while work is not, why?

Q: how is the caloric value of a food sample determined?

A: Calorific value is defined as the amount of energy contained in per Kg of the food.

Q: Which of the following is not necessary to state of a chemical system? a) colour b) composition c)…

A: The state of a chemical system is defined in terms of some variables like pressure , temperature ,…

Q: Which of the following characterizes an endothermic process in the styrofoam calorimetry experiment?…

A: The energy difference between the products and reactants is known as the energy change of a…

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: An automobile engine provides 621 Joules of work to push the pistons. In this process the internal…

A: According to the first law of thermodynamics, the following expression is obtained: ∆U=q+w…

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

A: Endothermic processes are the processes which absorb heat energy from the surroundings. These…

Q: Can a chemical reaction ever give off more energy than was originally contained in its reactants?

A: According to law of conservation of energy, energy can neither be created nor be destroyed. It can…

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: Draw an enthalpy diagram for a general exothermic reaction; label the axis, reactants, products, and…

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Q: An automobile engine provides 549 joules of work to push the pistons. In the process the internal…

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Q: The internal energy can be increased by ________. (a) transferring heat from the surroundings to…

A: As per the first law of thermodynamics, the change in internal energy of the system is equal to the…

Q: What do you mean by Enthalpy and Entropy ?

A: Enthalpy for the reaction is the energy, generally in the form of heat, which is required in case of…

Q: During a(n)_ process, energy is transferred from the system to the surroundings.

A: System : A specified part of the universe with real (or) imaginary boundaries Surroundings : The…

Q: Suppose you are exercising and after exercising, you feel that your body became warm and you stated…

A: Internal energy  is energy  stored  in a body . It can be chemical  energy  stored  in form of fats…

Q: 1. What is the heat flowing into/out the gas when the gas expands from A to B? 2. What is the work…

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Q: fuel emits the most carbon dioxide

A: When a fuel is burned, the amount of CO2 (carbon dioxide) produced is a function of the content of…

Q: Explain what is first law of thermodynamics. How it is related to the conservation of energy?

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Q: State the second law of thermodynamics. How does the second law explain why heat travels from a…

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Q: Which has the sign for the enthalpy change different to the other three?

A: Enthalpy change is defined as the heat that passes into or out of the system during a chemical…

Q: Is internal energy a state function?

A: Energy is the capability of doing work.

Q: A calorimeter is used to measure the enthalpy of a reaction. Label the system and the surroundings.

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Q: What is the energy of the reactants?

A: The energy of reactants is defines as the energy of the reaction at time zero.

Q: Which of the following is not a state function?

A: State Function:- Thermodynamic function of properties which depends upon the initial and final state…

Q: State the second law of thermodynamics. How does the second law explain why heat travels from a…

A: To be precise second law of thermodynamics is about entropy, it states that the entropy of an…

Q: A chemical reaction is run in which 152 Joules of heat are generated and 461 Joules of work are done…

A: Given: In a chemical reaction 152 Joules of heat are generated and 461 Joules of work are done by…

Q: What sum determines the change in energy of a system? O heat released and work performed O heat…

A: A process in which heat energy is transferred from a system to the surroundings is referred as…

Q: What is the change in internal energy of the system? Exp

A: Given Q = 198 kJ            W = 120 kJ

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

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Q: What is pressure-volume work? How is it calculated?

A: Pressure-volume work is the work which is done by or done on the fluid or gaseous system during…

Q: NaOH N: КОН H,O, heat D,0 NEt,, heat

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Q: Use the data in the following image to answer this question. a.The reaction involved the…

A: Given: HCl is the limiting reagent. Moles of HCl =0.0600 mol ΔT =4.75oC Heat capacity = 3.97 J/g…

Q: A chemical reaction is run in which 461 Joules of heat are generated and 592 Joules of work is done…

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Q: Explain An endothermic reaction ?

A: The endothermic reaction has to be explained.

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: When the sign of an energy change is being determined, this would always be with respect to what?

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Q: A gas is compressed from an initial volume of 5.70 L to a final volume of 1.24 L by an external…

A: Given:Initial Volume V1 = 5.70 L. Final Volume V2= 1.24 LPressure = 1.0 atm.Heat = -125 J (energy is…

Q: What is the ratio of the net work done by the system during the cycle and the heat absorbed from a…

A: Second Law of thermodynamics :  It is impossible for a system operating in a cycle connected to a…

Q: An automobile engine provides 585 Joules of work to push the pistons. In this process the internal…

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Q: The exchange of energy between a system and its surroundings can occur in two ways: _____________…

A: In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its…

Q: A chemical reaction is run in which 198 Joules of heat are generated and 633 Joules of work are done…

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