Calculate the enthalpy change, ΔHrxn, for the neutralization of HCl with NaOH, in kJ per mole of HCl neutralized, given that the temperature change is from 20°C to 27°C and 37.50 mL of 1 M NaOH and 37.50 mL of 1 M HCl were used.

When 3.50 g of Ba(s) is added to 100.00 g of water in a container open to the atmosphere, the reaction shown below occurs and the temperature of the resulting solution rises from 22.00°C to 47.40°C. If the specific heat of the solution is 4.18 J/(g °C), calculate the heat absorbed by the solution.

When 8.00 g of Ba (s) is added to 100.00 g of water in a container open to the atmosphere, the reaction shown occurs and the temperature of the resulting solution rises from 22.0°C to 77.62°C. If the specific heat of the solution is 4.18 J/(g°C), calculate ΔH for the reaction. Assume no heat is lost to the surroundings.

When iron metal is mixed with hydrochloric acid, the following reaction occurs: 2Fe(s) + 6HCl(aq) → 2FeCl3(aq) + 3H2(g). When 1.104 g of iron is mixed with 26.023 g of HCl in a coffee cup calorimeter, the temperature rises from 25.2°C to a final temperature of 32.5°C. What is the enthalpy change (ΔH) for the reaction per mole of iron, assuming the specific heat capacity of the solution is 4.18 J/g°C and the total mass of the solution is 100.0 g?

Which of the following is the correctly balanced thermochemical equation for the combustion of methane (CH₄) with oxygen (O₂) to form carbon dioxide (CO₂) and water (H₂O), given that the enthalpy change is -890 kJ/mol?

Calculate the heat of combustion of ethane (C2H6) using the following thermochemical equation: C2H6 + 3.5 O2 -> 2CO2 + 3H2O. Given the standard heats of formation for ethane gas, carbon dioxide gas, and water liquid are -84.7 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol, respectively.

If 24.0 grams of carbon monoxide (CO) undergoes complete oxidation to form carbon dioxide (CO2), how much heat is released, assuming the reaction is exothermic? The balanced equation is: 2CO(g) + O2(g) → 2CO2(g), ΔH = -566 kJ/mol.

What final temperature will 120 g of benzene at 7°C have after it absorbs 2.20 kJ of heat? The specific heat capacity (Cp) of benzene is 1.74 J/g°C.

What is the change in enthalpy in kilojoules when 3.20 mol of Mg is completely reacted according to this reaction: 2Mg(s) + O2(g) -> 2MgO(s)? ΔH = -1204 kJ