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------------------------------------------------ If the enthalpy of fusion and enthalpy of vaporization of sodium metal are 2.6 kJ/mol and 98.2 kJ/mol respectively, what is:

a) The total enthalpy change when 1 mol of sodium is converted from solid to vapor?

b) The enthalpy change when 1 mol of sodium is melted and then vaporized?

c) The enthalpy change when 1 mol of sodium is vaporized?

d) The enthalpy change when 1 mol of sodium is melted?

The total enthalpy change when 1 mol of sodium is converted from solid to vapor: To calculate this, you need to add the enthalpy of fusion and enthalpy of vaporization. For sodium, it would be 2.6 kJ/mol (fusion) + 98.2 kJ/mol (vaporization) = 100.8 kJ/mol.

The enthalpy change when 1 mol of sodium is melted and then vaporized: This would be the sum of the enthalpies of fusion and vaporization, which is 100.8 kJ/mol.

The enthalpy change when 1 mol of sodium is vaporized: In this case, it would be the enthalpy of vaporization only, which is 98.2 kJ/mol for sodium.

The enthalpy change when 1 mol of sodium is melted: This would be the enthalpy of fusion, which is 2.6 kJ/mol for sodium.