Calculate the change in enthalpy for the reaction below using the following data table. 2B5H9(1) + 1202(g) → 5B,03(s) + 9H20(1)

Q: 3- Calculate the molar enthalpy change when tungsten is heated by 15 K.

A: From standard sources we get, the molar heat capacity of tungsten is 24.2 J/mol K

Q: A 1.45 g sample of acetic acid , HC2H3O2 was burned in excess oxygen in a bomb calorimeter. The…

A: We have to predict the heat of combustion.

Q: The enthalpy of formation for H2O(g), CO2(g), and C2H5OH(l), in kJ/mol, are given as follows:…

A:

Q: Write down a chemical equation for which the enthalpy of the reaction is identical to the molar…

A: Enthalpy of formation is the enthalpy when 1 mole of product is formed by its constituent elements.

Q: Carbon monoxide (CO) is a highly poisonous gas. Write the equation that represents the standard…

A: Given: C(graphite) + O2(g) → CO2(g) ΔH° = −394.0 kJ......(i)2 CO(g) + O2(g) → 2 CO2(g) ΔH° = −566.0…

Q: Using the following data, calculate the standard enthalpy of reaction for the coal gasification…

A:

Q: A chemist measures the enthalpy change AH during the following reaction: 2 Al(OH),(s)→ Al, O,(s) + 3…

A:

Q: Use standard enthalpies of formation to calculate ΔH∘rxn for the following reaction:…

A: ∆H°rxn = ∑np ∆H°f (products) - ∑np ∆H°f (reactants)

Q: Table sugar (sucrose) is hydrolyzed to form glucose (a simple sugar) according to the following…

A: If the reaction is carried out in multiple step instead of single step the the heat of enthalpy will…

Q: For which one of the following is the enthalpy of the reaction the same as the enthalpy of…

A: Enthalpy of fornation :-  The enthalpy change involved in the formation of 1 mole of a compound from…

Q: Fe,O3(s), with carbon monoxide, CO(g), as shown in the balanced equation below: Fe,O3(s) + 3CO(g) →…

A: given (1) CO(g) + 1/2O2(g) → CO2(g)                       ΔH° = -283 kJ (2) 2Fe(s) + 3/2O2 (g) →…

Q: You wish to know the enthalpy change for the formation of liquid PCl3 from the elements. P4(s)+6…

A:

Q: Table sugar (sucrose) is hydrolyzed to form glucose (a simple sugar) according to the following…

A:

Q: Calculate the standard enthalpy of the reaction for the process 3RO(g) → R20(g) + RO2(g) using the…

A:

Q: Suppose we combust a 0.794 g sample of hexane (C6H14, molar mass = 86.18 g/mol) in a bomb…

A:

Q: Photosynthesis is one of the most important metabolic processes to take place on the Earth. It…

A: Balance the given reactionCalculation of heat of formation for balanced equationHeat of reaction…

Q: A scientist measures the standard enthalpy change for the following reaction to be 2885.4 kJ:…

A: 6CO2 (g)  + 6 H2O (l)  ---> C6H12O6 (s) + 6 O2 (g)  ∆Hrxn  = 2885.4 KJ/mol ∆H°f H2O = ?

Q: Determine the enthalpy of reaction for the following: CH3CH=CH(s) + 4.502(g) → 3CO2(g) + 3H₂0 (1)

A:

Q: Consider the following reaction: C(s, graphite) + 2H2O(l) → CO2(g) + 2H2(g), AHrxn = ? Given the…

A: Given that, the reaction is:

Q: 4. For which of the following reactions would the enthalpy of reaction be labelled AH,º? NO(g)…

A: The standard enthalpy of formation ∆H°f is defined as the amount of heat is absorbed or evolved…

Q: A scientist measures the standard enthalpy change for the following reaction to be -18.4 kJ: Ca(OH)2…

A: From the Given:∆Hf° (CaCl2(s)) = -795.8 kJ/mol∆Hf° (H2O(l)) = -285.8 kJ/mol∆Hf° (Ca(OH)2(aq)) =…

Q: Calculate the standard enthalpy change for this reaction:  Mg(s) + 2H2O(l) -> Mg(OH)2(s) + 2H2(g)

A: ∆H°=∆Hproduct=∆Hreactant

Q: Carbon disulfide is a colorless liquid. When pure, it is nearly odorless, but the commercial product…

A: Calculate the standard enthalpy change for the given reaction ---

Q: A scientist measures the standard enthalpy change for this reaction to be -1149.8 kJ/mol. 2H,S(g) +…

A: Consider the given reaction is as follows; 2 H2S g     +   3 O2g     →    2 H2Ol   +   2 SO2g…

Q: You wish to know the enthalpy change for the formation of liquid PC13 from the elements. P4 (s) + 6…

A: The objectiveof the question is to calculate the enthalpy change for the formation of .

Q: A scientist measures the standard enthalpy change for the following reaction to be -896.4 kJ:…

A: Given : a reaction And ∆H° = -896.4 KJ

Q: Calculate the standard enthalpy of formation, AHfº(in kJ mol-¹), of solid MgO, given the following…

A: The thermochemical equations can be treated as algebraic equation which can be added,  subtracted,…

Q: PCI5(s) can be prepared by the reaction PCI3(1) + Cl2(g) - PCI5(s). Calculate the enthalpy change…

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Q: What is the enthalpy of the overall reaction? 2A + C + D ⟶ Z + G           ΔΔHoverall = ?…

A:

Q: Using the two equations below and the provided data table, calculate the standard enthalpy of…

A: The enthalpy change of a reaction is the sum of the standard enthalpy of formation of the products…

Q: A scientist measures the standard enthalpy change for the following reaction to be -577.0 kJ:…

A: We have given that  H2CO(g) +O2(g)  →  CO2(g)  + H2O(l)                                   ∆Hrxn =…

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + O₂(g) → 2PbO(s)…

A: Recall the given reactions,                          1 2 Pb s  +  O2 g  →  2 PbO s…

Q: Many portable gas heaters and grills use propane, C3H8(g). Using enthalpies of formation, calculate…

A: C3H8+5O2(g)→3CO2(g)+4H2O(l)                 ∆H°rxn=?Known values:-∆H°fCO2=-393.3 KJmol∆H°fH2O…

Q: The first step in the preparation of lead from its ore (galena, PbS) consists of roasting the ore.…

A: The balanced reaction is as follows -     2PbS(s) + 3O2(g) ---> 2SO2(g) + 2PbO(s) The standard…

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.