Calculate ΔE in kilojoules per mole for the following reaction:               Th → He + Ra Atomic masses: 230Th = 230.0332, 4He = 4.00260, 226Ra = 226.02544.

Q: Suppose that the reaction of 2.172 moles consumes 3.21 kJ of heat. What is the molar enthalpy of the…

A: The answer to the following question is :

Q: Consider these reactions, where M represents a generic metal. 2 M(s) + 6 HCI(aq) → 2 MCI, (aq) + 3…

A: Hess's law states the enthalpy change for the overall reaction is the sum of the enthalpies of…

Q: Calculate the difference, in kilojoules, between AE and AH for the following exothermic reaction at…

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Q: Given the following reactions N2 (g) + O2 (g) → 2NO (g) 2NO(g) + O2(g) → 2N (g) the enthalpy of…

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

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Q: How many kilojoules of heat will be released when exactly 1 mole of iron, Fe, is burned to form…

A: The reaction for standard enthalpy of formation of Fe2O3 is depicted by equation.

Q: How much did our sodium-in-water demonstration raise the temperature of water in the dessicator jar?…

A: The objective of the question is to find out how much the sodium-in-water demonstration raised the…

Q: When 1.23g C6H6(l) are burned, 51.5KJ of heat are released.  Calculate the enthalpy for this…

A: Heat of formation of the compound can be calculated from the reaction and enthalpy of the reaction .…

Q: Using the data given in this question, find the amount of energy needed to break down (decompose)…

A: Energy required = number of moles of Oxygen x ΔH/stoichiometric coefficient of oxygen   Number of…

Q: Which of the following reactions is exothermic? Select one: Ammonium nitrate + water. Combustion O…

A: R The answer us given as follows  Combustion is always exothermic reaction  Means CH4 +O2_____>…

Q: Given these reactions, where X represents a generic metal or metalloid 1) H, (g) + 0,(g) → H,O(g)…

A: Given,

Q: (a) If you are given AH for the reaction, what additional information do you need to determine AE…

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Q: How much energy is required to produce 1.00 kg of aluminum by the reaction 2 Al2O3(s) + 3 C(s) +…

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Q: potential energy diagrams for the following reactions:    2 Ag (s) + Cl2 (g) = 2 AgCl(s) +254 kj

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

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Q: A typical frostless refrigerator uses 655 kWh of energy per year in the form of electricity. Suppose…

A: 1 KWh is equal to 3600 kilojoules. 655 KWh is equal to 655 × 3600 kilojoules = 2.358 × 106…

Q: What is the enthalpy change for the first reaction? Fe2O3(s) → 2Fe(s) + 3/2O2(g) ΔH =  4Fe(s) +…

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Q: Benzoic acid of mass 1.20 g is reacted with oxygen in a constant volume calorimeter to form H₂O(1)…

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Q: Calculate ΔH for the reaction CuS(s)+ Cu(s)→ Cu2S(s), given the following equations: 2 Cu(s)+ O2(g)→…

A: Interpretation - To determine the ∆H for the reaction CuS(s)+ Cu(s)→ Cu2S(s) by the given data which…

Q: The neutralization reaction of HClO4 (strong acid) with NaOH is given below. HClO4 (aq)  + NaOH…

A: The volume and molarity of HClO4 and NaOH is 128.1 mL and 0.649 M. The initial and final temperature…

Q: Calculate the enthalpy of decomposing hydrogen iodide to produce hydrogen and iodine.…

A: (1)  2HI(g) →  I2(s) + H2(g)           ;              ΔH⁰ = y kJ (2)  I2(s) → I2(g)…

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.