Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: 4 S(s) + 6 O2(g) → 4 SO3(g). Given: SO2(g) → S(s) + O2(g) ΔH°rxn = +296.8 kJ, 2 SO2(g) + O2(g) → 2 SO3(g) ΔH°rxn = -198.2 kJ. What is the ΔH°rxn for the target reaction?

In a coffee-cup calorimeter, 49.85g of 0.2 M HCl solution is mixed with 49.85g of 0.2 M NaOH solution, both initially at the same temperature. If the final temperature of the mixture is measured to be higher, what is the primary reason for this temperature change?

The ΔH for the solution process when solid sodium hydroxide dissolves in water is -44.4 kJ/mol. When a 12.89-g sample of NaOH (MM= 40.0 g/mol) dissolves in 250.00 g of water in a coffee-cup calorimeter, the temperature increases from 24°C to what final temperature?

Two solutions, initially at 24.69°C, are mixed in a coffee cup calorimeter. When a 200.0 mL volume of 0.100 M AgNO3 solution is mixed with a 100.0 mL sample of 0.100 M NaCl solution, the temperature in the calorimeter rises to 25.16°C. Determine the enthalpy change (ΔH) for the reaction, assuming the specific heat capacity of the solution is 4.18 J/g°C and the density is 1.00 g/mL.

Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: 4 NO(g) + 2 O2(g) → 4 NO2(g). Given: N2(g) + O2(g) → 2 NO(g), ΔH°rxn = +183 kJ. What is the ΔH°rxn for the reaction 4 NO(g) + 2 O2(g) → 4 NO2(g)?

Given the following thermochemical equation and data, calculate the standard enthalpy of formation (ΔH⁰f) for IF(g): IF7(g) + I2(g) → IF5(g) + 2 IF(g) with ΔH⁰rxn = -89 kJ. The standard enthalpies of formation are: IF7(g) = -941 kJ/mol, IF5(g) = -840 kJ/mol, I2(g) = 62.42 kJ/mol.

Using the given reactions, what is the enthalpy change (ΔH°) for the reaction: 2 CO(g) + 2 H2(g) → CO2(g) + H2O(g)?

Using the provided table and the equation below, determine the heat of formation (in kJ/mol) for KClO₃. 2 KClO₃ (s) → 2 KClO₂ (s) + O₂ (g) ΔH° = 296.2 kJ/mol

What is the enthalpy change (in kJ) of a chemical reaction that raises the temperature of 250.0 mL of solution having a density of 1.25 g/mL by 3.33 °C? (The specific heat of the solution is 3.74 J/g-K.)