What happens when a system undergoes a series of changes or processes and then returns to the initial state?

Q: Amount of energy greater than the energy contained in the reactants, which must be overcome for a…

A: Collision theory tells us that basic requirement for a reaction to occur is that the reacting…

Q: A student is using calorimetry to determine the heat of solution for various salts. When the student…

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Q: what is the heat evolved

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Q: (a) Which of the following cannot leave or enter a closed system:heat, work, or matter? (b) Which…

A: (a) A closed system is a type of system in which energy can be exchanged in the form of heat or work…

Q: I am a bit confused.  Isnt the formula to find the change in temperature the Final Temperature minus…

A: q = heat energy q = heat energy is the total amount of energy. This is an amount and has no…

Q: What is specific Heat?

A: Thermodynamics is a study of flow of heat or other forms of energy. The change in heat is one of the…

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: 1. When you add heat energy to a chemical system, what happens to the speed of molecular reactions?…

A: 1.When the temperature is increased, it means that the molecules will move with a higher speed.The…

Q: What is the state of nature and does it still exist? If so, where?

A: The state of nature is a free entity in which no positive law exists; it is free from any form of…

Q: Define calorie (cal)

A: The calorie is a unit of energy defined as the amount of heat needed to raise a quantity of water by…

Q: Which of these refers to a condition in which two processes occur at the same rate resulting in no…

A: As per guidelines if multiple questions posted, first question is allowed to answer, please post…

Q: When a system absorbs heat, a part is stored within the system as the energy of internal motions of…

A: When a system absorbs heat, a part of it is  stored within the system as the energy of internal…

Q: Which term is not correctly matched? endothermic - energy is absorbed universe - system plus…

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Q: A formation reaction h

A: 10. A formation reaction has elements in standard states as reactant.     TRUE Ex.  2Fe(s) +32O2(g)…

Q: How does the effect of temperature change differ for an exothermic reaction compared to an…

A: Temperature change is the flow of heat gets increased or decreased during the reaction.

Q: References Use the References to access important values if needed for this question. A chemical…

A: Answer is. 232joul

Q: An automobile engine provides 613 Joules of work to push the pistons. In this process the internal…

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Q: What is a state function? List some examples of state functions.

A: Introduction: State function and Path function: Thermodynamic parameters whose value depends only on…

Q: Identify the following processes as endothermic (endo) or exothermic (exo) from the viewpoint of the…

A: Answer: System 1 The ice ---> Exo The water----> Exo Substance burning ---> Endo Chemicals…

Q: A positive delta E results when the system ..... energy from the surroundings

A: Surrounding: The part of the universe that is interacting with the system.          System: The part…

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: An automobile engine provides 624 Joules of work to push the pistons. In this process the internal…

A: Calculate heat q for the engine ?

Q: can you explain why energy must initially be consumed in an exothermic chemical reaction?

A: Exothermic reactions are those reactions which release energy in the surroundings due to the…

Q: A helium-filled balloon spontaneously deflates overnight as He atoms diffuse through the wall of the…

A: According to the first law of thermodynamics, There has no change in the system's internal energy as…

Q: When energy is exchanged between the system and the surroundings, it is exchanged as either .... or…

A: The study of exchange of energy between system and surroundings is called Thermochemistry. On the…

Q: How the energies of the reactants, products, and intermediates compare ?

A: In a chemical reaction: reactants -> products This process is achieved through the formation of…

Q: relationship of transportation and thermodynamics?

A: In physics, the study of transport phenomena deals with the exchange of mass, energy, charge,…

Q: diffrentiate between physical and chemical effect of temperature.

A: A chemical change (chemical reaction) is a change of materials into other, new materials with…

Q: Which of the following accurately describes the conditions of an isolated system? a. Both energy and…

A: Isolated system, as the name suggests, is something where no matter and no energy can be…

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: During a Calorimeter experiment, you needed to dry the hot metal sample prior to putting it in the…

A: Colorimeter is an apparatus used to measure enthalpy change of a reaction or specific heat capacity…

Q: )Which of the following cannot leave or enter a closed system: heat, work, or matter? Which cannot…

A: The system consists of those molecules which are reacting.The surroundings are everything else; the…

Q: What is the difference between a calorie and a Calorie?

A: To give: difference between calorie and Calorie?

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

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

Q: Moving an object some distance against an opposing force is known as Oforce O energy O work O…

A: This question is related to dimensional analysis of chemistry. Dimensional analysis is the analysis…

Q: Explain at the molecular level what happens when a body absorbs heat. 3. What do we call thermal…

A: The process of heat transfer is primarily a molecular process and the state of a body after heat is…

Q: Draw the reaction

A: The given compound is an amide with formula CH3-CH2-CO-NH-CH3. It is N-methyl propanamide. When an…

Q: Which of the following cannot leave or enter a closed system heat , work or matter? Which cannot…

A: According to first law of thermodynamics the change in internal energy is expressed as shown below:

Q: Compare balls A and B in terms of potential energy in both the initial and final setups. * -Held in…

A: Given,

Q: What is chemical energy?

A: The energy that is present in some chemical substance is called chemical energy.

Q: If a system does not change its volume during the course of a process, does it dopressure–volume…

A: If the volume of the system does not change will pressure-volume work is done or not has to be…