ThermochemistryMedium

Question

Formation of ozone from oxygen is an endothermic process. In the upper atmosphere, ultraviolet is the source of energy that drives the reaction. Assuming that both the reactions and the products of the reaction are in standard states, the standard enthalpy of formation of ozone from the following information

3O2(g) → 2O3(g), ΔHo = 286 kJ, is

Options

A.+143 kJ/mol
B.−143 kJ/mol
C.+286 kJ/mol
D.−286 kJ/mol

Solution

$\Delta_{f}H_{O_{3}(g)} = - \frac{286}{2} = 143\text{ kJ/mol}$

Create a free account to view solution

View Solution Free
Topic: Thermochemistry·Practice all Thermochemistry questions

More Thermochemistry Questions

The bond energy (in kcal mol-1) of a C - C single bond is approximately...Standard molar enthalpy of formation of CO2 is equal to...Estimate the average S–F bond energy in SF6. The values of standard enthalpy of formation of SF6(g), S(g) and F(g) are −...Stearic acid [CH3(CH2)16CO2H] is a fatty acid. 1.0 g of stearic acid was burned in a bomb calorimeter. The bomb had a he...Sublimation energy of Ca is 121 kJ/ mol. Dissociation energy of Cl2 is 242.8 kJ/ mol, the total ionization energy of Ca(...