Using the two given equations calculate the AH for the following target equation. TARGET: CaQ (s) + CO₂(g) → CaCO3(s) Given: 1. Ca(s) + CO₂(g) + 1/2O₂(g) → CaCO3(s) 2. Cao (s) Ca(s) + ½/2O₂(g) Is this reaction Endothermic or exothermic? AH = -812.8 kJ ΔΗ = 634.9 kJ

Q: Some commercial drain cleaners contain two components; sodium hydroxide and aluminum powder. When…

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Q: Which of the following equations is an exothermic reaction?   a H2 (g) + ½ O2 (g) → H2O (l) ΔH =…

A: Exothermic reaction Reaction in which Energy is released so it is exothermic reaction.

Q: The standard enthalpy of formation of CO(g) is –111 kJ/mol [refer to this equation C(s) + 1/202g) →…

A: Interpretation -  To determine the enthalpy (∆Ho) for the reaction which is given as - 2C(s) + O2…

Q: A student performs a calorimetry experiment. The student combines 100. g of 0.40 M HC1(aq) with 100.…

A: Heat absorbed by the particular species = mass × heat capacity × temperature change

Q: 8 SO,(9) + 16 H,S(9)→3 Sg(s) + 16 H,0(1) AH=-1863. kJ Use this information to complete the table…

A: given reaction, the enthalpy change is 8 SO2 (g) + 16H2S(g) → 3S8(s) + 16H2O(l), ΔH = -1863. KJ    -…

Q: For the reaction H2(g) + 1/2 O2(g) --> H2O(g), DHo = -241.8 kJ/mol. what mass of H2(g) in grams is…

A: To solve this problem we have to use the given thermochemical equations. First we have to write the…

Q: Given the following: S8 (g) + O₂(g) → SO₂ (g) 3 8(g) +02 (g) → SO3 (g) The heat of reaction for SO₂…

A: To calculate the heat of reaction for given reaction, we need to modify the given two reactions for…

Q: Given the data: 4 NH3(g) + 302g) → → 2N2(g) + 6H2Og AH = - 1530 kJ H28) + O2(e) → H2O AH = -288 kJ…

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Q: Classify the reaction endothermic or exothermic and give the change in enthalpy of the reaction. 2…

A: Given: Reaction: 2 SO3 (g)→ 2S (s)+ 3O2 (g) Δ H=798 kJ

Q: Fe2O3(s) + 3CO(s) → 2Fe(s) + 3CO2(g) ΔH = -28.0 kJ 3Fe(s) + 4CO2(s) → Fe3O4(s) + 4CO(g) ΔH = +12.5…

A: Enthalpy of reaction 1 -  ∆H = -28.0 KJ  Enthalpy of reaction 2 -  ∆H = +12.5 KJ  Enthalpy for final…

Q: Using the equations 2 Fe (s) + 3 C2 (g) → 2 FECI3 (s) AH° = -800.0 kJ/mol Si(s) + 2 Cl2 (g) → SiCl,…

A: 2Fe (s)  +  3Cl2 (g)  ------->  2FeCl3 (s)   ∆ H1° = -800.0 kJ/mol  ...................(1) Si (s)…

Q: Calculate AH for the reaction: 2NH3 (9) + 02 (9) → N½H4 (1) + H,O(1) given the following data: 2NH3…

A: Welcome to bartleby !

Q: Using the equations 2 Sr(s) + O2 (g) → 2 SrO (s) AH° = -1184 kJ/mol CO2 (g) → C (s) + O2 (g) AH° =…

A: The reactions given are, 1) 2)

Q: Need help with #4

A: The balanced reaction taking place is given as, => CuSO4 + 2 KOH  → K2SO4 + Cu(OH)2  Given:…

Q: 3- When 10.0 g of C5H12 is burned (combustion with excess oxygen gas) 453 kJ of energy is released.…

A: (a) The combustion of pentane results in the formation of carbon dioxide and water. The equation is…

Q: You wish to find the enthalpy for the reaction 6 Gel (s) + 14 NHI (s) → 3 Ge:H6 (1) + 7 N2 (g) + 38…

A: The enthalpy for the first reaction is determined as follows. 2Ge (s)+3H2g→Ge2H6l  ∆H=137.3 kJ/mol,…

Q: The standard enthalpy change for the following reaction is -56.0 kJ at 298 K. Na(s) + 1/2 H₂(g)…

A: Important points needs to be remember for enthalpy change If a given chemical reaction is reversed…

Q: Combustion reactions involve reacting a substance with oxygen When compounds containing carbon and…

A: The reaction taking place is given as, => C2H2 (g) + 2 H2 (g) ------> C2H6 (g) Given : Heat of…

Q: Commercial cold packs consist of solid ammonium nitrate and water. NH4NO3 absorbs 25.69 kJ of heat…

A: Given that: Mass of ammonium nitrate = 3.40 gMass of water = 100 gInitial temperature of solution =…

Q: Suppose a pair of chemical compounds A and B can react in two different ways: Reaction 1 gives…

A: A reaction coordinate diagram is used to indicate the relationship between the energy values of the…

Q: According to the following reaction, how many grams of hydrogen would be needed to produce 5.450 x…

A: In this question, we want to determine the mass of Hydrogen gas in grams unit.  You can see details…

Q: When  2 moles of HBr(g) react with cl2(g) to  form  HCl(g) and Br2(g) according to the following…

A: Given reaction equation for the reaction of HBr(g) and Cl2(g) gives HCl(g) and Br2(g) as follow;…

Q: The reaction between nitrogen and oxygen is given below: N2(g) + O2(g) → 2 NO(g) We therefore know…

A: ANSWER 2 NO (g) ---> N2(g) + O2(g) As we can see that, The eqn 2 NO (g) ---> N2(g) + O2(g) is…

Q: The reaction between hydrogen and fluorine gas proceeds according to the reaction equation H2(g) +…

A: The energy difference between the products and reactants is known as the energy change of a…

Q: According to the equation below, do the products have stronger or weaker bonds than the reactants?…

A: Enthalpy of reaction, ΔHrxn = Enthalpy of formation of products - Enthalpy of formation of reactants…

Q: N2(g)+2O2(g)⟶2NO2(g)ΔH=+66.4 kJ    Use Reaction 3.   How much energy (in kJ) is absorbed when…

A: Recall the reaction, N2 + 2O2 ------> 2NO2  ∆H = +66.4 KJ  Volume of NO2=159 L  Energy absorbed =…

Q: Silane, SiH4, burns according to the reaction, SiH4 + 2O2 → SiO2 + 2H2O, with ΔH° = –1429 kJ. How…

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Q: Determine the enthalpy for the following reaction, given A (NH3(g)) = -46.1 kJ/mol, AH (NO(g = +90.3…

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Q: 4. Determine the enthalpy of formation for Lithium Oxide given the three equations below: 2Li(s) +…

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Q: When 1.42 g of iron reacts with 1.80 g of chlorine, 3.22 g of FeCl2(s) and 8.60 kJ of heat is…

A: Iron reacts with chlorine to form iron(II) chloride. When 3.22 g of FeCl2s is formed, 8.60 kJ of…

Q: The flame in a torch used to cut metal is produced by burning acetylene (C2H2)(26.04 g/mol) in pure…

A: Given that,One mole of acetylene release heat = 1251 KJMolar mass of acetylene = 26.04g/moleThe…

Q: When 3.8 g A are reacted with 8.5 g D,  according to the balanced chemical equation below, 33 kJ of…

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Q: Instant cold packs can be made from ammonium nitrate by mixing/reacting it with water (reaction…

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Q: The enthalpy change for the reaction of hydrogen gas with oxygen to produce water is -484 kJ for the…

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Q: Hydrazine, N2H4, is a liquid used as a rocket fuel.   It reacts with oxygen to yield nitrogen gas…

A: The reaction given is N2H4(liq)  +  O2(g)  →  N2(g)  +  2 H2O(liq)

Q: Calculate the enthalpy change for the thermite reaction: 2Al(s) + Fe2O3 (s)→2FE(s)+ A2O3(s), AH°…

A: Enthalpy change calculation:

Q: Using the equations N₂ (g) + O₂ (g) 2 NO (g) AH° = 180.6 kJ/mol N₂ (g) + 3 H₂(g) → 2 NH₂ (g) AH° =…

A: This question is based on the Hess's Law. According to this law, the enthalpy change for a…

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.