Calculate the molar enthalpy change of H2O(1) when liquid water is heated from 41.7°C to 76.2°C.

Q: What mass of water need to evaporate from your skin in order to dissipate 170,000 J of heat from…

A: Given data heat dissipate : q = 170000 J  =  170.000 KJ H2O (liq) →H2O (g)           ∆Hv=40.7…

Q: Calculate the standard enthalpy of formation of NO(g) (in kJ/mol) from the following data. N2(9) + 2…

A: N2(g) + 2O2(g) -------> 2NO2(g).     ∆H0298 = 66.4 kJ 2NO(g)+ O2(g)---------> 2NO2(g).…

Q: Using the equations H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol C (s) + 2 F2 (g) → CF4 (g) AH° =…

A: Hess's law of constant heat summation says that for a reaction occurring in multiple steps, the net…

Q: Using the equations H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol C (s) + 2 F2 (g) → CF4 (g) AH° =…

A: To solve this problem we will use the given two thermochemical equations .

Q: enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

A: Enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. what…

Q: In a coffee-cup calorimeter, 140.0 mL of 1.3 M  NaOH and 140.0 mL of 1.3 M  HCl are mixed. Both…

A: In this whole process, the heat given out by the reaction is gained by the solution and as a result,…

Q: Calculate the standard enthalpy change for the reaction: 2C3H18(1) + 1702(g) ® 16CO(g) + 18H,O(1)…

A: When a thermochemical equation is reversed then its ∆H value chages its sign. When a thermochemical…

Q: what is the change in the enthalpy in kj/kg for the complete combustion of 39.0 g of fructose,…

A:

Q: Nitrogen and oxygen gas combine to form nitrogen dioxide according to the reaction N2(g) + 20s(g)…

A:

Q: Using the equations H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol C (s) + 2 F2 (g) → CF4 (g) AH° =…

A: The reactions given are, 1) H2 (g) + F2 (g) -------> 2 HF (g)                  ΔHo = -79.2…

Q: Given the standard enthalpy changes for the following two reactions: (1) 4C(s) + 5H2(g) C¾H10(g) AH°…

A: The enthalpy change accompanying a chemical reaction during the transformation of 1 mol reactants to…

Q: Given the standard enthalpy changes for the following two reactions: (1) 2C(s) + 2H2(g) ->…

A: Recall the given equations with value of standard enthalpy chages 2Cs + 2H2g → C2H4g  ,∆H°=52.3 kJ…

Q: In a calorimeter, 1.80 g of NH&NO%0) (80.04 gmol') is mixed with 74.0 g of water at an initial…

A: Given data,Mass of NH4NO3=1.80gMass of water=74.0gInitial temperature=25oCFinal…

Q: In a coffee cup calorimeter, 75.0mL of 0.050M silver nitrate is mixed with 90.0mL of 0.100M sodium…

A: The enthalpy change for the reaction of silver nitrate and sodium sulfide from the given data is to…

Q: Using the equations H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol C (s) + 2 F2 (g)→ CF4 (g) AH° =…

A: The quantity of energy released/absorbed in a chemical reaction is furnished by the enthalpy change…

Q: Which of the following scenes depict the process of an increase in the enthalpy?     Stirring a…

A: Answer: Enthalpy of the system decreases when process is exothermic and it loses heat and enthalpy…

Q: Using the equations 2 H, (g) + O, (g)→ 2 H,O (1) AH° = -572 kJ/mol Ca (s) + ½ Ô, (g) → CaO (s) AH° =…

A:

Q: Si(s) + 2 F2(g)        ΔH° =  1.61×103  kJ What is the standard enthalpy change for this reaction…

A:

Q: 4. A 15.0 g sample of ethanol in an alcohol burner, is used as fuel to heat up 2.0 L of coffee from…

A: The heat generated during the combustion of 15.0 g is used to increase the temperature of the 2.0 L…

Q: I. Give the thermochemical data below, find the change in enthalpy for the following reactions: NO…

A: ∆H of a reaction is the amount of heat released in the reaction.

Q: Image attached

A: Consider the desired equation is as follows: 2NO2g→N2O4g Consider the given reactions as follows:…

Q: 38.When 36.92 grams of fictional compound X is added to water to make 297.9 grams of solution, the…

A: First calculate the energy for solution using formula of q = m*c*∆T and then divide this calculated…

Q: Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction   2…

A: Hess' law of constant heat summation: The Hess law states that the change of enthalpy in a chemical…

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: What mass of aluminum metal would absorb 250.0 kJ when it melted at its melting point? The molar…

A: One gram of aluminium metal absorbs 396.6 Joule heat.

Q: Lead has a molar heat capacity of 26.4 J/K•mol. What molar enthalpy change occurs when lead is…

A:

Q: When 51.96 grams of fictional compound X is added to water to make 348.0 grams of solution, the…

A: Mass of compound X is = 51.96 g Molar mass of compound X is = 92.68 g/mol Specific heat of solution…

Q: What is the enthalpy for reaction 1 reversed? reaction 1 reversed: N2O4→N2 + 202 Express your answer…

A: Enthalpy change is a thermodynamic parameter of a chemical reaction/ process.Positive sign of…

Q: Calculate the standard enthalpy of formation of gaseous hydrogen fluoride (HF) using the following…

A: Standard enthalpy is the enthalpy change by the formation of 1 mole product from its constituent…

Q: Using the equations H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol C (s) + 2 F2 (g)→ CF4 (g) AH° =…

A:

Q: When 59.59 grams of fictional compound X is added to water to make 330.6 grams of solution, the…

A: Given that, the mass of the fictional compound added = 59.59 grams. And the mass of the water =…

Q: What mass of aluminum metal would absorb 250.0 kJ when it melted at its melting point? The molar…

A:

Q: Calculate the enthalpy of methanol (CH 3OH (l) (MW=32.0 g/mol), if a 2.885 g sample of methanol is…

A: Heat capacity of bomb calorimeter C = 727.1J/0C Change in temperature ∆T = 11.380C mass of methanol…

Q: What is the mass (in g) of a sample of diamond (specific heat = 0.502 J/(g K) which evolve (-8.96)…

A: We know, heat evolved, Q = ms(Tfinal - Tinitial)

Q: For the chemical reaction H2 (g) + F2 (g) – 2 HF (g) AH° = -79.2 kJ/mol. %3D What is the enthalpy…

A: The given enthalpy of the reaction is -79.2 kJ/mol for the reaction: H2 (g) + F2 (g) → 2HF (g)

Q: For the chemical reaction Ca (s) + ½ O₂ (g) → CaO (s) ∆H° = -635 kJ/mol. What is the enthalpy for…

A: Ca (s) + ½ O₂ (g) → CaO (s) ∆H1°  .............................(1) 2 CaO (s) → 2 Ca (s) + O₂ (g)…

Q: The hypothetical element X and an oxide of X undergo the following reactions with oxygen, with the…

A: Answer: -150 KJ  Solution:

Q: Given the standard enthalpy changes for the following two reactions: (1) 2C(s) + 2H2(g) C2H4(g) AH°…

A:

Q: When 0.625 grams of ethanol(C2H5OH) undergoes combustion in a bomb container calorimeter attaining a…

A: We are given 0.625 g of ethanol which undergoes combustion to yield carbon dioxide and water and…

Q: For the chemical reaction H2 (g) + F2 (g) → 2 HF (g) AH° = -79.2 kJ/mol. What is the molar enthalpy…

A:

Q: Ethylene glycol, HOCH2CH2OH, is used as antifreeze. It is produced from ethylene oxide, C2H4O, by…

A:

Q: Ethanol (C2H5OH) is currently blended with gasoline as an automobile fuel. Part A Write a balanced…

A: Given: The blending of ethanol with gasoline is used as an automobile fuel. The combustion of…

Q: 1. Use standard enthalpies of formation table to determine the change in enthalpy for each of these…

A: Answer (a) the heat change of the reaction is =+11.75kj/mol Answer (b) the heat change of the…

Q: Use the standard of enthalpies table to determine the change in enthalpy for:   N2(g) + 3 H 2(g)…

A:

Q: Using the equations 2 Sr(s) + O2 (g) 2 Sro (s) AH° = -1184 kJ/mol CO2 (g) - C (s) + O2 (g) AH° = 394…

A: Interpretation: From the given information, the enthalpy of new reaction is to be determined. Given…

Q: E2C.2(b) The standard enthalpy of formation of phenol is -165.0kJ mol. Calculate its standard…

A: Given: Standard enthalpy of formation of phenol = -165.0 kJ/mol The combustion of a compound gives…

Q: In which of the reactions below is ÄH (enthalpy change) not an enthalpy of formation? a. Mg(s)  +…

A: Enthalpy of formation: When one mole of the substance is formed by its constituent elements in its…

Q: The chemical equation for photosynthesis is as follows: 6 CO2 + 6 H2O → CH1206 + 6 O2 Every year,…

A: Given-> 6CO2(g) + 6H2O (l) -->C6H12O6(s) + 6O2(g) Weight of CO2 = 2.85 ×10^4 kg

Q: 1.15 g of LiCl (42.39 g/mol) is dissolved in 25.0 g H2O in a constant-pressure calorimeter and the…

A: Given that 1.15 g LiCl was dissolved in 25.0 g water. Number of moles can be calculated from the…

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.