Question

Calculate the amount of energy required to completely desorb 2 moles of hydrogen molecules from a metal surface if the enthalpy of desorption for each H2 molecule is 436 kJ/mol.

Answer 1

To calculate the amount of energy required to completely desorb 2 moles of hydrogen molecules from a metal surface, we can use the following equation:Energy = moles  enthalpy of desorptionGiven that there are 2 moles of hydrogen molecules and the enthalpy of desorption for each H2 molecule is 436 kJ/mol, we can plug these values into the equation:Energy = 2 moles  436 kJ/molEnergy = 872 kJTherefore, 872 kJ of energy is required to completely desorb 2 moles of hydrogen molecules from a metal surface.