Gibbs Free Energy and Enthalpy

The video tutorial explains a problem involving Gibbs free energy, focusing on a reaction at 300 Kelvin. It details the calculation of the standard Gibbs free energy change using the products minus reactants method. The tutorial then relates Gibbs free energy to enthalpy and entropy, using the equation Delta G = Delta H - T Delta S, and solves for the standard change in enthalpy.

What is the temperature at which the given reaction occurs?

• 400 Kelvin

• 273 Kelvin

• 300 Kelvin

• 350 Kelvin

What is the standard entropy change for the reaction?

• -0.094 J/mol K

• 0.094 kJ/mol K

• -0.094 kJ/mol K

• 0.094 J/mol K

What is the standard Gibbs free energy of formation for CO2?

• -257.2 kJ/mol

• -137.2 kJ/mol

• -394.4 kJ/mol

• 0 kJ/mol

How do you calculate the standard Gibbs free energy change?

• Sum of reactants and products

• Products minus reactants

• Reactants minus products

• Difference between reactants and products

What is the standard Gibbs free energy change for the reaction?

• -137.2 kJ/mol

• -394.4 kJ/mol

• 0 kJ/mol

• -257.2 kJ/mol

Which equation relates Delta G, Delta H, and Delta S?

• Delta G = Delta H + T Delta S

• Delta G = Delta H - T Delta S

• Delta G = T Delta S - Delta H

• Delta G = Delta H / T Delta S

What is the missing variable we need to find in the equation Delta G = Delta H - T Delta S?

• Delta S

• Delta H

• Delta G

• T

What is the value of Delta G used in the final calculation of Delta H?

• -257.2 kJ/mol

• -394.4 kJ/mol

• -137.2 kJ/mol

• 0 kJ/mol

What is the temperature used in the final calculation of Delta H?

• 350 Kelvin

• 400 Kelvin

• 300 Kelvin

• 273 Kelvin

What is the final calculated standard change in enthalpy for the reaction?

• -285.4 kJ/mol

• -257.2 kJ/mol

• -137.2 kJ/mol

• -394.4 kJ/mol