1)What is the specific heat if 24.8 g of a metal absorbs 275 J of energy and the temperature rises from 20.2 °C to 24.5 °C? 2)Calculate the enthalny for the combustion of 1.0 mol

Q: Suppose that the molar enthalpy of a reaction is -73.45 kJ/mol and 4.222 moles are reacted. How many…

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Q: e the information to answer the following questions. This reaction is... Suppose 41.0 g of NH3…

A: The given data: 2NH3(g) ==> N2(g) + 3H2(g)∆H° = 160 KJ When ∆H° is positive,  it means heat is…

Q: if 0.0102 moles reacted and 476.5 J of heat were absorbed by the reaction in a coffee cup…

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Q: 2. Write the thermochemical equation when one mole of nitrogen gas, N, reacts with one mole of…

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Q: A chemical reaction in a bomb calorimeter produces 5.17 kJ of heat. If the heat capacity of the…

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Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: In an exothermic reaction, heat is released, and in an endothermic reaction, heat is absorbed.

Q: the change in enthalpy for the reaction of sodium hydroxide with hydro chloric acid is -57.9 kJ. if…

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Q: .If a system does 84.0 kJ of work on its surroundings and releases 105 kJ of heat against a constant…

A: Given : Work done on surrounding by system = 84.0 KJ  And heat released = 105 KJ Since heat is being…

Q: Nitromethane (CH3NO2) burns in air to produce significant amounts of heat. 4 CH3NO2(l) + 3…

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Q: if 0.0221 moles reacted and 633.2 J of heat were absorbed by the reaction in a coffee cup…

A: We will calculate the enthalpy of reaction using relation between heat and enthalpy

Q: Based on this value and the standard enthalpies of formation for the other substances, the standard…

A: Standard enthalpy of formation is the change in enthalpy that accompanies the formation of one mole…

Q: In the reaction, C(s) + O2(g) → CO2(g), the enthalpy of formation CO2(g) is lower than enthalpies of…

A: Since the net enthalpy of the reaction  C(s) + O2(g) → CO2(g),   is given by  enthalpy of reaction =…

Q: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s), ΔH = -1652 kJ (d) How much heat is released when 11.40 g Fe and 2.13…

A: In the given question we have to calculate the heat released during the reaction,  First of all, we…

Q: The change in enthalpy for the reaction of sodium hydroxide with hydrochloric acid is -57.9 kJ. If…

A: The heat generated from a reaction can be calculated by the multiplication of mass (m), specific…

Q: Write out the chemical reaction whose enthalpy is the heat of formation of gaseous methane, CH4.

A: Standard equation of formation is equation represents formation of one mole compound from its…

Q: You mix 125ml of 0.180 m csoh with 50.0 ml of 0.450 m hf in a coffee cup calorimeter and the…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of 1 kg…

Q: The change in the internal energy of a system (ΔE) is -74 J. What is the work done when the system…

A: We have to calculate the work done.

Q: kJ

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Q: The standard molar enthalpy of formation of NH3(g) is –45.9 kJ/mol. What is the enthalpy change if…

A: Given, The standard molar enthalpy of the formation of NH3(g) is given by= -45.9 kJ/mol The mass of…

Q: When 23.6g of calcium chloride, Was dissolved in water in a constant pressure calorimeter, the…

A: For heat capacity ,heat and temperature ,there is a relation for all: q=c×△TWhere:q= Heat…

Q: A system receives 825 J of heat and delivers 825 J of work to its surroundings. What is the change…

A: Given:Heat received by system, dQ = 825Jwork done by system, dW=825Jchange in internal energy, dU…

Q: 6. A 128g piece of Iridium at 95 C is dropped into a 45.2g of water at 17.3 C. The final temp of the…

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Q: Liquid hydrogen peroxide is an oxidizing agent in many rocket fuel mixtures because it releases…

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Q: A balanced, generic thermochemical equation is shown below.  A, B, and C are substances involved in…

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Q: A chemist measures the energy change AH during the following reaction: 2 NH3(g) → N₂(g) + 3H₂(g) ΔΗ=…

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Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: The definition of an exothermic reaction is one in which the system (where the reaction is taking…

Q: The heat released in a reaction can be used as a source of mechanical power. What industrial…

A: Heat energy can be converted into mechanical energy . So the law of Thermodynamics can help to to…

Q: Consider the combustion of methane (CH). Suppose that 1789 kJ of heat are produced. What mass of O,…

A: To determine the mass of oxygen (O₂) consumed during the combustion of methane (CH₄), we'll start by…

Q: What is the change in energy (in J) for a system that lost 344 J of heat to the surroundings, and…

A: Assume that work (w) is done on the system, so w will be positive.Given:Heat lost, Q  = - 344 JWork…

Q: The specific heat capacity of a pure substance can be found by dividing the heat needed to change…

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Q: A scientist measures the standard enthalpy change for the following reaction to be 215.5 kJ : CH4(g)…

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Q: ) If a gas absorbs 2.0 J of heat from the surroundings and then performs 15.2 J of work, what is the…

A: • The values provided in the question are:-       i) Quantity of heat absorbed by the gas, Q = 2.0 J…

Q: Under what conditions does the enthalpy change equal the heat of a process

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Q: The complete combustion of propane, C 3H 8(g), is represented by the equation:  C 3H 8(g) + 5 O 2(g)…

A: when the heat is evolved in a reaction then that reaction is known as exothermic reaction.  The…

Q: When a system gives off 100J of heat and the surroundings does 50J of work on the system, what is…

A: Hello. Since your question has multiple parts, we will solve first question for you. If you want…

Q: Suppose the 25.0 g of the following substances all initially at 27.0 °C absorb 2.35 kJ of energy.…

A: Amount of heat,Q required to change the temperature of a substance of mass ,m and specific heat…

Q: You mix 125 mL of 0.230 M with 50.0 mL of 0.575 M in a coffee-cup calorimeter, and the temperature…

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Q: If 0.0181 moles reacted, and 372.8 J of heat were absorbed by the reaction in a coffee cup…

A: When 0.0181 mole of the reactant reacts the heat absorbed is = 372.8 J The enthalpy change in kJ/mol…

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.