A student modeled the exothermic synthesis reaction that occurs when solid iron and liquid sulfur chemically react to produce solid iron (ii) sulfide. The chemical reaction and the student's model are shown below. The student's model is incorrect. Identify two things in the model that need to be corrected. Explain why they are wrong and how the student needs to correct them. Fe (s) + S (1) → FeS (s) Before After Fe S Fe Potential Energy: Kinetic Energy: Potential Energy: Kinetic Energy: System Surroundings System Surroundings System Surroundings System Surroundings

Q: It’s a really cold day outside, so to be able to make it through your walk to Morehead Labs you…

A: (a) It is given that hand warmers have an iron powder that reacts with oxygen to form iron(III)…

Q: 1. The following statements are true EXCEPT: a. The heat of reaction is also known as the enthalpy…

A: As per rules only the first question can be answered: Heat of reaction = heat of formation of…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 253. kJ during a…

A: The sign convention for heat flow are as follows : When the heat flows into the system, a positive…

Q: A 6.91 mol sample of ethylene is burned in a bomb calorimeter that has heat capacity of 348.0 J C-1.…

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Q: Explain how chemical reactions obey the law of conservation of energy. Include where energy is found…

A: Answer -  law of conservation of energy - The total energy of an isolated system remains constant…

Q: What does the graph represent?(Select the correct answer below) Reactants AH Phodacts Peaction…

A: Chemical reactions are classified into two types on the basis of heat involved, exothermic and…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 308. kJ during a…

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Q: Nitrogen monoxide, a gas recently found to be involved in a wide range of biological processes,…

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Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 349. kJ during a…

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Q: 1. A dust explosion occurs in a saw mill. a catalytic converter. Cataluct Concentratin 8. Calcium…

A: Those chemical compounds which are reacting together to form the new one are known as the reactants.…

Q: Iron has a smaller heat capacity than water. Suppose that 10 kg of either substance was heated…

A: Heat capacity is amount of heat required to raise the temperature of substance by one degree…

Q: 13. A student is investigating different types of reactions. Which of the following actions would be…

A: Answer is given below.

Q: 98. In order to check for concentration or amounts of substances, principles of this branch of…

A: This question discusses about the branch of chemistry which basically involved in the analysis of…

Q: A student dissolves 11.3 g of ammonium nitrate (NH,NO,) in 250. g of water in a well-insulated open…

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Q: Which of the following is an example of an endothermic process? The combustion of methane, CH4,…

A: Chemical reactions take place by absorbing or releasing heat energy. The processes in which heat…

Q: Instead of chasing the Roadrunner, Wile E. Coyote thinks he may have found his retirement plan! He…

A: Answer is explained below.

Q: Decide whether each of these reactions is exothermic or endothermic. 1. When two chemicals mix their…

A: An exothermic reaction is one that is associated with the evolution of energy (usually in form of…

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 261. kJ during a…

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Q: Using the reaction for the combustion of methanol: 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(g) ΔH comb =…

A: The combustion of methanol is given by the chemical reaction,2CH3OH(l)+3O2(g)→2CO2(g)+4H2O    ; ∆H…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 369. kJ during a…

A: Given information,    Enthalpy change = - 369 kJ    Work done = - 157 kJ

Q: Surrounding Reaction A Reaction B Temperature Initial Temp 25.1°C 25.1°C Final Temp 30.2°C 20.0°C…

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Q: Fill in the Blanks Type your answers in all of the blanks and submit For the following reaction at…

A: Endothermic: A reaction that the system absorbs energy from its surrounding in the form of heat is…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 373. kJ during a…

A: We have to calculate the change in energy and nature of reaction.

Q: 16) Which of the following is an exothermic process? A) condensation of water vapor B) Ammonium…

A: Exothermic process is a process in which energy get released during the course of reaction and the…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 290. kJ during a…

A: Given conditions are: ∆H=qP=-290 kJ where '-' sign shows decrease in enthalpy w=54 kJ where w is the…

Q: a)What is the average kinetic energy of argon atoms at a temperature of 115°F? in joules  b)What is…

A: a) We have to find the kinetic energy of argon at temeperature of 1150 F According to kinetic…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 338. kJ during a…

A: Enthalpy change(∆H) = 338 KJ Work (W) = +135 KJ (positive because work done on the system)

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 151. kJ during a…

A: Enthalpy of a mixture of gaseous reactants are decreased by 151 KJ and - 92 KJ of work is done…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 219. kJ during a…

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Q: 1.  The rusting of iron is due to its reaction with oxygen. An iron nail weighing 8.531 g was left…

A: The balanced chemical equation for rusting of iron is given by

Q: Questioh 4 Calcium carbonate breaks down into calcium oxide and carbon dioxide when heated. The…

A: given, calcium carbonate = calcium oxide + carbon dioxide   products have greater energy than…

Q: The reaction: 2 Na + Cl2 --> 2 NaCl + 822 kJ, is Group of answer choices exothermic protothermic…

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Q: Consider the reaction. heat 2 Al(s) + Fe,O3(s) Al,03(s) + 2 Fe(l) If 11.5 kg Al reacts with an…

A: The balanced chemical equation for the reaction of aluminum with Fe2O3 is given as:…

Q: 5. Classify the following as an endothermic or exothermic reaction. (a) burning of natural gas…

A: Endothermic reactions are the one in which heat is required or absorbed during a chemical…

Q: Peanut Marshmallow Mass of Water  50g  50g Initial Mass of Food Sample and Paper Clip   10.42…

A: As we can see that in this experiment , food was burnt to heat water. Which means the heat released…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 222. kJ during a…

A: The enthalpy change of the given reaction is = +222. kJ The work done by the gas mixture is =-167.…

Q: 1. The combustion of ethene, C2H4, is an exothermic reaction. Use the information below to determine…

A: Given, Chemical Reaction : C2H4 + 3 O2 ---> 2 CO2 + H2O  ∆H = -1390 KJ

Q: Measurements show that the enthalpy of a mixture of gaseous reactants increases by 140. kJ during a…

A: Enthalpy of a mixture of gaseous reactants increases by 140. KJ  It means enthalpy change (∆H) = +…

Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 257. kJ during a…

A: Study of flow of matter is called thermodynamics. Thermodynamic processes are of different types.…

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 107. kl during a…

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Q: Instant cold packs used to ice athletic injuries on the field contain ammonium nitrate and water…

A: Given: Amount of ammonium nitrate = 1.25 g Total volume of the solution = 25.00 mL = 0.025 L Initial…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 175. kJ during a…

A: Answer :- 1. Change in enthalpy of gas mixture = ∆H = -254 kJ 2. Exothermic…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 223. kJ during a…

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Q: Propane reacts with oxygen gas to produce carbon dioxide and water as shown in the reaction below.…

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Q: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 278. kJ during a…

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Q: 13. Energy is stored in the body in adenosine triphosphate, ATP, which is formed by reaction between…

A: ATP is the cell's energy currency. It is required by the cells for performing various functions in…

Q: gettyimages Doring Kindercey 2924

A: Answer  In the picturer showing that one atom break into two atoms…

Q: Identify the process which undergoes exothermic process. A. Cooking egg B. Baking bread C. Burning…

A: Heat, light, and sound are all forms of energy released by chemical reactions. Exothermic responses…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 373. kJ during a…

A: In the given process the energy of the system is decreased and the work is done on the system. The…

Q: The reaction of hydrogen chloride(g) with oxygen(g) to form water(g) and chlorine(g) proceeds as…

A: Given reaction: 4 HCl (g) + O2 (g) → 2 H2O (g) + 2 Cl2 (g) It is also given that 10.7 kJ of energy…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.