Given the thermochemical equations:  2NaN3 → 2Na + 3N2         ∆H = +42.7 kJ  How many grams of NaN3 would be decompose by 125 kJ of heat? Select one: a. 281 b. 581 c. 381 d. 681

Q: Use the following equations to calculate the heat of the reaction for the synthesis of diborane.…

A:

Q: Consider the following thermochemical equations (Note: HA is a weak acid) H+(aq) + OH-(aq) → H2O(l)…

A: Choose the equation that shows the correct relationship between their enthalpy changes--

Q: The heat of combustion for 1.00 mole of carbon to carbon dioxide is -410. kJ. How many kJ of heat…

A: Given : Moles of carbon = 1 mole

Q: Consider these reactions: Reaction 1: H2 (9) + Cl2 (g) → 2HC1(9) AH=-184.6 kJ %3D Reaction 2: 20F2…

A: ->If ∆H = +ve => reaction is endothermic reaction ->if ∆H = ,-ve => reaction is…

Q: Calculate ΔH (in kJ/mol) for the reaction described by the equation. 6 NH3(g) + 4 O3(g) → 3 N2O(g) +…

A: Given Chemical reaction: 6 NH3(g) + 4 O3(g) → 3 N2O(g) + 9 H2O(l)

Q: C2H4 (g) + H2O (l) → C2H5OH (l) ΔH=? 1.C2H5OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O (l) ΔH = -1367,5 KJ…

A:

Q: Given that ∆H° for the reaction is -42 kcal/mol and the bond dissociation enthalpies for the C - H,…

A: Since in the above reaction, 1 C-H bond is being dissociated in CH3CH3 and 1 C-Cl bond in being…

Q: In reaction 1, If we had used 4 grams of NAOH instead of 2 g, would the heat gained by the solution…

A:

Q: How many grams of C5H12

A: ∙Given:- mass =1.24kg or 1240g                    T1 Initial temperature=23.6°C…

Q: Given the following reactions:             N2(g) + 2O2(g) → 2NO2(g)      ΔH = 66.4 kJ…

A: • The desired equation is,       N2(g) + O2(g) → 2NO(g) ; ∆H= ??    • The given thermochemical…

Q: Consider the following reactions:                  C2H6 (g)  +  7/2 O2 (g)  →  2 CO2 (g)  +  3 H2O…

A:

Q: The combustion of 1 mol of propane (C3H8) evolves 2220 kJ of heat. How much heat is released or…

A:

Q: Octane has a density of 0.692 g/mL at 20 ∘C. How many grams of O2 are required to burn 19.0 gal of…

A: Density is a physical quantity that can be determined with the help of the mass and volume of the…

Q: How much energy is absorbed during the complete reaction of 3.00 kg carbon (MW = 12.01 g/mol) given…

A: Mole=Weight of substance/Molar mass of substance

Q: Consider the following reaction: 3 C(s) + 4 H₂(g) → C3H8(g) Which of the following statements is…

A: The spontaneous nature of a system can also be predicted by the Gibbs free energy change of the…

Q: Calculate the fuel value of C5H12, given that ΔH°comb= –3535 kJ/mol. 2. How much heat is released…

A: In the given question we have to calculate the fuel value and heat release of particular amount of…

Q: 8. The equation below represents the burning of carbon disulfide, CS20) in a calorimeter. CS20) +…

A:

Q: The flame in a torch used to cut metal is produced by burning acetylene (C2H2) in pure oxygen.…

A:

Q: Knowing the following, 2 NH3 (g)  →  N2 (g)  +  3 H2 (g)                    ΔH° = +92 kJ 2 H2 (g)…

A: Given :-  2 NH3 (g)  →  N2 (g)  +  3 H2 (g)                    ΔH° = +92 kJ 2 H2 (g)  +  O2 (g)  →…

Q: Calculate the quantity of heat, in kilojoules, required to raise the temperature of 9.25 L of water…

A:

Q: 66. Using the bond energies in Table 7.3, determine the approximate enthalpy change for each of the…

A: Please be noted that the value of enthalpy change for (b) is not - 128 kJ but it is found to be -…

Q: enthalpy

A:

Q: If 45.2 g of C₂H6 is burned in oxygen, how much heat will be released? (HINT: Balance the equation…

A:

Q: How much heat is released when 6.00 g of methane is combusted using the reaction below? CH4 + 2O2 →…

A: The given reaction is: CH4+2O2→CO2+2H2O Calculation of no. of mol of methane: No. of mol=given…

Q: Consider the following reaction.   2CH3OH(g)⟶2CH4(g)+O2(g)Δ?=+252.8 kJ   Is this reaction…

A: A reaction in which heat is given off and enthalpy change is negative in the reaction is known as…

Q: Use the enthalpy for the combustion of propane (C3H8) to compare the energy from this common fuel to…

A: It is impossible to create energy from nothing in accord with the "conversation of energy" and…

Q: 1. How many grams of copper (II) oxide are needed to produce 693 kJ of energy? 3 CuO + 2 Al -> 3 Cu…

A:

Q: heat of the reaction for the formation of methanol.

A:

Q: 1. The thermochemical equation showing the formation of ammonia, NH, from its elements is Nalg) +…

A:

Q: Given that the reaction of 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 3 H20 (g) ΔΗ - 906 kJ %3D |- What would…

A: Answer : correct option is  226.5 KJ ∆H for this reaction would be 226.5 KJ

Q: Consider the following equation: 2 KCIO3 --> 2 KCI+ 3 O2 If potassium chloride has a heat of…

A: In a reaction, reactants react to form the products.  Enthalpy is the total energy involved in the…

Q: Using the following equation for the combustion of postane, calculate the heat associated with the…

A: The postane reacts with oxygen to form phosphorous dioxide and water. The equation for the balanced…

Q: The flame in a torch used to cut metal is produced by burning acetylene (C2H2) in pure oxygen.…

A: we have to calculate the mass of acetylene needed to cut through a piece of steel that requires 90.8…

Q: The heat of combustion for ethane, C2H6C2H6 , is 47.8 kJ/g. How much heat is produced if 7.65 moles…

A: A chemical reaction in which a substance burns in the presence of oxygen to form the products  like…

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: Consider the following thermochemical equations (Note: HA is a weak acid) H+(aq) + OH-(aq) → H2O(l)…

A:

Q: 33.9 Given the following two reactions and their enthalpy changes,             2 ClO2 (g)   -->…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: For the highly exothermic reaction H2(g) + 1/2 O2(g) → H2O(g) qrx =DHrx = -242 kJ, What quantity of…

A: Given: no of moles of H2 =17.9molno of moles of O2 = 1.13 molThe reaction is:H2(g) + 1/2 O2(g) →…

Q: Which of the following is an endothermic reaction? A. CH4(g)  + 2 O2(g) → CO2(g) + 2 H2O(l) B.…

A: Endothermic reactions are defined as reactions in which energy is absorbed whereas exothermic…

Q: Given that the enthalpy of neutralization for the reaction of HCl (a strong acid) and NaOH (a strong…

A:

Q: Consider the following thermochemical equations (Note: HA is a weak acid) H+(aq) + OH-(aq) → H2O(l)…

A: This question can be solved using Hess's law of constant heat summation.

Q: For the reaction S(8) + O₂(g) → SO2 (g) AH = -296 kJ per mole of SO₂ formed. a. Calculate the…

A:

Q: How much heat is released when 0.95 grams of sulfur (S) is used in the reaction?  Molar mass 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…

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.