When NH NO3(aq) reacts to form N20(g) and H20(1), 150 kJ of energy are evolved for each mole of NH NO3(aq) that reacts. Complete the following thermochemical equation. NH,NO3(aq)→N20(g) + 2H,0(1) AH=| kJ

Q: How much heat evolves from burning 16.4 g of sulfur, Sg, in air? g S8(s) + 8 O2(g) → 8 SO2(g) AH°r=…

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Q: How much heat is produced by the complete combustion of 264 gg of CH4CH4?

A: Given:CH4g+2O2g→CO2g+2 H2Og∆Hrxn°=-802.3 kJ

Q: Given the following hypothetical thermochemical equations: 2QJ3 (g) + 3Q2X (g) → 4Q2 (g) + 3J2X (l)…

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Q: When methanol, CH3OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is…

A: Methanol, CH3OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is…

Q: The following are the thermochemical equations for the combination of oxygen with sulfur to form…

A: The given reaction is, 2SO2(g) + O2(g) ---> 2SO3(g) Calculate ∆H for this reaction.

Q: Consider the following reaction: 2 PbS (s) + 3 O2 (g) → 2 PbO (s) + 2 SO2 (g) AHxn = -827.4 kJ What…

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Q: A sample of zirconium experiences a temperature change of +790.5 K while absorbing 150820 joules of…

A: Temperature change (∆T) = + 790.5 K Heat absorbs (q) = + 150820 J                       (positive…

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

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

A: Given reaction is, 2 HgO (s)  →  2 Hg (l) + O2 (g)                     ∆H = 182 kJ As,  ∆H is…

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: Calculate the energy required to heat 610.0 mg of mercury from -8.0 °C to 12.1 °C. Assume the…

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Q: 5. Sand is converted to pure silicon in a three step process. The third step is SiCl,(g) + 2Mg(s) →…

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Q: kJ

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Q: When methanol, CH,OH, is burned in the presence oxygen gas, 0, a large amount of heat energy is…

A: A chemical reaction is symbolic representation of the conversion of substances to new substances. In…

Q: When ammonia (NH3) and oxygen react at a temperature at which both compounds are in the gaseous…

A: When balanced reactions are represented including phases of all species as well as energy change,…

Q: When methanol, CH,OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A: CH3OH + 3/2 O2 ...> CO2 + 2H2O dH = -764 KJ Enthalpy of reaction is negative. It means combustion…

Q: When CO(g) reacts with O2 (g) according to the following reaction, 283 kJ of energy are evolved for…

A: In a thermochemical equation, the enthalpy change (ΔH) of a chemical reaction is also written with…

Q: 9. Use the following thermochemical equations as needed to find the heat of formation of diamond:…

A: Given equations are : 1). C (diamond) +  O2 (g)  --------> CO2 (g) , ΔH1 = -395.4 KJ  2). 2CO2…

Q: Calculate the ΔH°rxn for the reaction shown below. 3 NO2(g) + H2O(ℓ)  →  2 HNO3(aq) + NO(g)…

A: ΔH°rxn is Standard Enthalpy of reaction .  Standard Enthalpy of the following reaction is to be…

Q: A 800.8 g sample of strontium is subjected to a temperature change of +197.53K. The specific heat…

A: Mass of the sample of strontium (m) = 800.8 g Temperature change ∆T = 197.53 K Specific heat…

Q: The reaction of iron with oxygen is a common occurrence. You can observe the resulting rust on…

A: Recall the given equation,                     4 Fe s  +  3 O2 g  →  2 Fe2O3 s…

Q: (b) Study the following thermochemical data very carefully: AH° = 242.3 kJ Cl2(g) → 2Cl(g) I2(g)…

A: The formation of compounds from its atoms in their stable sates at standard pressure and temperature…

Q: 112. The thermochemical equation for the combustion of methanol is CH3OH (g) + 3/2 O2(g) → CO2(g)…

A: The chemical reaction of the combustion of methanol is CH3OH (g) + 3/2 O2(g) → CO2(g) + 2 H2O(l) ΔH…

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: Given the following hypothetical thermochemical equations: 2QJ3 (g) + 3Q2X (g) → 4Q2 (g) + 3J2X (l)…

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Q: When CO(g) reacts with NO(g) according to the following reaction, 373 kJ of energy are evolved for…

A: A chemical reaction in which heat energy is evolved is called exothermic reaction

Q: A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into…

A: Given: The pressure of the mixture is 1 atm. The heat released is 349 kJ. The heat that flows in…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 533.0 mg sample…

A: We know the expression for the molar heat capacity is => q = n×cp×ΔT where, q is the heat, n is…

Q: Natural gas burns in air to form carbon dioxide and water, releasing heat. CH4(g) + O2(g) → CO2(g)…

A: Given : Mass ( m ) = 23 gram Temperature (∆T) = 32°C   Find mass of CH4 = ??

Q: When methanol, CH,OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A: Given information:                      CH3OH(g) + 32O2(g)  → CO2 (g)  + 2H2O(l)        ∆H = -764 kJ

Q: What mass of galena (PbS) is converted to lead (II) oxide if 200 kJ of heat are produced?

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Q: A chemist measures the enthalpy change AH during the following reaction: 2 Al(s) + Fe,O3(s)→…

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Q: A chemist measures the enthalpy change AH during the following reaction: Fe(s) + 2HCl(g) →FeCl₂(s) +…

A: Given reaction is exothermic reaction, because heat is being released. If we write the opposite…

Q: A chemist measures the enthalpy change AH during the following reaction: 2 Al(s) + Fe,O3(s)→Al,O3(s)…

A: The given reaction is  The reactions for which change in enthalpy is to be calculated are these.…

Q: 2. Slaked lime (Ca(OH)2(s)) is produced when lime (calcium oxide, Cao (s)) reacts with liquid water.…

A: An EXOTHERMIC thermochemical reaction equation is written as Reactants ------> products + HeatOr…

Q: Solid calcium chloride dissolves in water according to the equation below. CaCl2 (s) ➝ Ca+2 (aq) +…

A: CaCl2 (s) ➝ Ca+2 (aq) + 2 Cl – (aq)      ΔHº = –81.3 kJ/mol Heat evolved = heat absorbed = Q Q = m .…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.34 kg sample…

A: Mol= weight/ molar mass  first find the moles in 0.34kg

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 639.0 g sample…

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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.