9. List the 6 state changes and indicate if they are endo- or exothermic.

Q: QUESTION 9. If the statement is true, write Tas your answer and if it is false, write F as your…

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Q: Consider a system of two atoms with a stable interaction between them (the atoms are stuck in the…

A: A question based on atoms. A potential energy well describing about the bonding between two atoms is…

Q: For an exothermic reaction, the sum of bond energies for the reactants are (greater/lesser) than…

A: Exothermic reaction - Those chemical reaction in which energy or heat is released during the…

Q: A hydrocarbon reacts with oxygen in a bomb calorimeter containing 2.00 kg of water. The temperature…

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Q: One hundred grams of a piece of metal was put in 222.2 g container and the water are at 20 deg C. Cp…

A: Given,  Mass of metal= 100 g Mass of water = 222.2 g  Cp(water) = 4.184 J/g-K Cp(metal) = 0.4444 J/K…

Q: What is calorimetry? Explain the difference between a coffeecup calorimeter and a bomb calorimeter.…

A: Calorimetry: The calorimetry is a technique that can be used to measure the amount of heat involved…

Q: Does an exothermic reaction go more to completion if I raise the temperature, lower the temperature,…

A: This can be explained by Le Chatelier principle.  A reaction go more completion means shifting of…

Q: Which of the following processes will increase the potential energy of the system? (You may select…

A: Potential energy of the system is the energy which can be converted to kinetic energy of a system by…

Q: ÇN 1) ÕH heat 2) OH . HN- OH %3D

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Q: Using the equations 2 H2 (g) + O2 (g) → 2 H¿0 (I) AH° = -572 kJ/mol Ca (s) + ½ O2 (g) → CaO (s) AH°…

A: If we multiply by any number or divide to the chemical reaction then ∆H will also multiply or divide…

Q: How will forgetting to start recording the temperature until after adding the HCl to the NaOH in the…

A: The heat released during the reaction can be calculated as follow,

Q: g. Ág(NH,), + -ОН CH, —СH, —С—н H,0

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Q: A chemist measures the energy change AH during the following reaction: 2 NH3(g) → N,(9)+3H2(g)…

A: The balanced reaction taking place is given as, => 2 NH3 (g) -------> N2 (g) + 3 H2 (g)…

Q: A chemist measures the energy change AH during the following reaction: 2 Fe₂O3(s)→ 4 FeO(s) + O₂(g)…

A: we have to calculate heat released or absorbed for the reaction of 67.5 g Fe2O3

Q: 4. The heats of vaporization for water and carbon disulfide are 40.7 kJ/mol and 26.8 kJ/mol,…

A: Since liquid molecules are constantly moving and have a wide range of kinetic energies, some of them…

Q: For a certain reaction at 25.0°C, the value of Kis 1.2 × 10–3.At 50.0°C the value of Kis…

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Q: Antoine Lavoisier used the first calorimeter to measure the heat a guinea pig produced during…

A: Internal energy of the molecule will be the amount of energy already present within the molecule. It…

Q: How is specific heat and heat of fusion seen in the coffee cup calorimeter experiment?

A: At coffee cup calorimeter, is an isolated system containing water.

Q: Calculate the difference, in kilojoules, between AE and AH for the following exothermic reaction at…

A: Since you posted multiple questions so as per Q&A guidelines of portal I solved first image…

Q: Heat (J) 1570 1570 Mass (g) 75.0 15.0 15.0 Heat Capacity (J/g °C) 4.18 (water) 4.18 (water) 0.921…

A: The heat gain or loss is the product of mass, specific heat,  and temperature changes.where,q is…

Q: Which of the following is incorrect?   A. Energy can be converted from one form to another but…

A: Thermal equilibrium is the state or condition wherein the temperatures of the elements in a system…

Q: Is the transformation or the reaction of cool CoCl2 to hot CoCl2 exothermic or endothermic? Explain

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Q: 7 6. 8750 J of heat are applied to a 170 g sample of metal, causing a 56°C increase in its…

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Q: State whether the potential energy of the underlined object increases or decreases as a result of…

A: With the increase in height or altitude potential energy increases.With the decrease in height or…

Q: In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used…

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Q: 7. Calculate the molar mass of benzoic acid.

A: "Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: For an exothermic reaction, the energy released from breaking bonds OA) depends on the entities…

A: During a chemical reaction, old bonds (reactant bonds) are broken and new bonds (product bonds) are…

Q: For the following reactions identify if they are exothermic or endothermic.    2NO2 → 2NO + O2 ΔH =…

A: The heat energy shift (∆H) that occurs when reactants become products is known as enthalpy of the…

Q: A 50.0 g sample of Chromium metal was heated to 103 degrees Celcius and then dropped into a beaker…

A: The formula used to calculating the temperature of metal water mixture is as follows: where, Cwater…

Q: Why do some molecules have more chemical/potential energy than other molecules—what specifically…

A: The chemical or potential energy of a molecule is determined by the arrangement of its constituent…

Q: Water changes from a liquid to a gas when heated to its boiling point because:Immersion Reader A)…

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Q: How much heat is absorbed by the surrounding if it does 43 J of work, decreasing the energy of the…

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Q: For exothermic reactions,the products have lower energy than reactants. explain why

A: The question is based on the concept of chemical thermodynamics. we have to explain why products…

Q: According to the Law of Conservation of Energy (Laws of Thermodynamics) Energy in a system is…

A: According to law of conservation of energy, total energy is constant and energy can only be…

Q: Indicate whether the reaction is exothermic or endothermic NH3(g) + HCI (g) → NH, CI(s) AHồ = -…

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Q: Is a reaction bewteeen NaOH and NH4Cl endothermic or exothermic ?

A: As we know that, If the sum of the enthalpies of the reactants is greater than the products, the…

Q: Exothermic Endothermic Heat Heat Heat Heat Which statement is correct? O When an endothermic process…

A: Endothermic process is a process which involves heat absorption from the surroundings, so as to…

Q: If 50.5 g of KBr are dissolved in 400.0 g of water at 25.0 °C in an insulated container, a…

A: Given that, The initial temperature of the solution is T1 = 25oC = (273+25) K = 298 K, The total…

Q: For exothermic reactions, the products have lower energy than the reactants.Explain why

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Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.