8. A constant volume calorimeter has a specific heat of 1.58 kJ/K. a) Calculate the molar internal energy change for combustion of 230 mg naphthalene (C₁0H8(s)) which causes the temperature to increase by 2.08 K. b) Calculate the enthalpy change for this reaction. c) Is the enthalpy change or internal energy change greater for this process? Explain your reasoning.

Q: Use the given information to calculate the enthalpy of reaction for the following reaction: P4010…

A: Since,According to Hess's law change of enthalpy in a chemical reaction is same regardless of…

Q: Why do elements always have ΔH∘f=0? a) The standard state of elements is the reference point for…

A: •Given:- Here is question is asking that why ∆H°f always zero for elements.

Q: A scientist measures the standard enthalpy change for the following reaction to be -17.2 kJ :…

A: Given- Reaction Ca(OH)2(aq) + 2 HCl (aq)  → CaCl2(s) + 2 H2O(l) ∆H°rxn = -17.2 kJ To find- ∆H°fHCl…

Q: 2. If 0.250 g of butane (C4H₁0) increases the temperature of a calorimeter by 12.4 °C, and the…

A: Answer:-This question is answered by using the simple concept of calculation of heat using the…

Q: Consider the two reactions. - 4N₂(g) + 3 H₂O(1) 2NH₂(g) + 3 N₂O(g) → 4 NH3(g) + 30₂(g) → 2N₂(g) +…

A: Since, The standard enthalpy of the formation is defined as change of enthalpy of 1 mol of the…

Q: A 2.296 g sample of an organic substance (MM = 342.3 g/mol) is burned in a bomb calorimeter, the…

A: Answer: This question is based on conservation of energy. The heat released during the combustion of…

Q: 5. Calculate the enthalpy of reaction for the following reaction that methanogenic bacteria use to…

A: Answer: Enthalpy of a reaction is always equal to the difference between enthalpy of formation of…

Q: H2(g) + F2(g) → 2 HF(g)    ΔH = -542 kJ What would be the enthalpy change for the reverse of the…

A: Since, The standard enthalpy of the formation is defined as change of enthalpy of 1 mol of the…

Q: b How much energy is evolved or absorbed as heat in the oxidation of 12.0 g of NH3? Heat of…

A: Enthalpy is a amount of heat evolved or absorbed for a chemical changes at constant pressure.

Q: Consider the following reaction: CO2 (g) + 4H2 (g) --> CH4 (g) + 2H20 (g) Given the following…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be -138.8 kJ : H2(g)…

A: The given reaction is as follows: H2(g)+C2H4(g) → C2H6(g) The standard enthalpy change for the…

Q: find the change in enthalpy for the reaction below, given the following reactions and change in…

A: Given 2NH3(g) →N2H4(l) + H2(g)    ΔH = 22.5 kJ 2NH3(g) → N2(g) + 3H2(g)  ΔH = 57.5 kJ CH2O(g) +…

Q: A scientist measures the standard enthalpy change for the following reaction to be -29.5 kJ: I2(g)…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be 223.4 kJ :…

A: Given that -  Enthalpy change of the following Reaction -  CaCO3(s) ---> CaO(s) + CO2(g) is =…

Q: A scientist measures the standard enthalpy change for the following reaction to be 37.8 kJ: CO₂(g) +…

A: The standard Enthaply change for a reaction can be calculated by:∆H°rxn = Σ∆H°f (products) - Σ∆H°f…

Q: 5. Use the data in the following tables and answer the following questions. a) The experimental data…

A: Given that, Mass of ethanol = 3.26 g Heat capacity of calorimeter = 11.7 kJ/0C Initial temperature…

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: 9.000 g of Compound X with molecular formula C,H, are burned in a constant-pressure calorimeter…

A: Given that the 9.000 g of compound X with a molecular formula of C4H8 is burned in a constant…

Q: Calculate the enthalpy change for the complete complete combustion of ethane (C2H6). (Note: the…

A:

Q: A 26.0 g sample of acetylene,C2H2, is burned in a bomb calorimeter in which a change in temperature…

A: we have to calculate the enthalpy of combustion of acetylene

Q: 8.000 g of Compound X with molecular formula C4H are burned in a constant-pressure calorimeter…

A: Mass of water = 10 kg Mass of C4H8 = 8g Temperature rise = 8.755°C

Q: For which one of the following reactions will the enthalpy change be approximately equal to the…

A: The relationship between enthalpy change and internal energy change is given by  ΔH = ΔU + ΔngRT…

Q: Use standard enthalpies of formation to determine the change in enthalpy for the following reaction:…

A: Applying concept of calculation of chage of enthalpy of chemical reaction. ∆Hreaction= ∆Hf…

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: A scientist measures the standard enthalpy change for the following reaction to be -145.7 kJ :…

A: The enthalpy of the reaction is considered as the state function that is it depends only on the…

Q: A chemist measures the energy change AH during the following reaction: CH,(9)+20,(9) →…

A: Exothermic reactions are those in which energy is released in the form of heat. And the standard…

Q: ) Write an equation for the combustion of 1 mol of pentane gas, C5H12(g), to form carbon dioxide gas…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be 80.1 kJ:…

A: Solution- ∆Hreaction=2∆HofFe2O4+∆Hof(H2O)- 3∆HofFe2O4+∆Hof(H2)∆Hreaction=2∆HofFe2O4+(-241.818kJ)-…

Q: what is the standard enthalpy of combustion of ethane in kJ/mol?

A: We have to find standard enthalpy of combustion of ethane in kJ/mol  Given  The standard enthalpies…

Q: 2. To study the possible amount of energy generated by a person, the person can be roughly viewed as…

A:

Q: What is enthalpy change for a reaction and how does this differ from the experimental heat flow…

A: Definition~ Enthalpy is the measurement of energy in a thermodynamic system. The quantity of…

Q: ICI is a corrosive colourless gas that dissolves readily in water. Aqueous HCL reacts with NaOH to…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be -1057.0 kJ :…

A:

Q: Heat, q, is energy transferred between a system and its surroundings. For a process that involves a…

A:

Q: Use constant-volume calorimetry to determine energy change. A 0.376-g sample of decanoic acid…

A: Given, The combustion reaction : C10H20O2(s) + 14O2(g) → 10 CO2(g) + 10 H2O(I)  mass of decanoic…

Q: A scientist measures the standard enthalpy change for the following reaction to be 36.8 kJ: CO₂(g) +…

A:

Q: standard enthalpy change for the following reaction to be -208.6 kJ : CO(g) + 3 H2(g)CH4(g) +…

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.