Question

If the molar heat of fusion of sodium is 2.63 kJ/mol, how much energy is needed to melt 180 g of solid sodium at its melting point?

Answer 1

Calculating the number of moles for $H_2O$ ;

$=(180g ×\frac{1 mole H_2O}{18g})$

$=10 moles H_2O$

To get the heat Energy ;

$=10 moles×2.63kJ/mol.$

=$+26.3kJ$