Question

0.036 kJ of energy is released in a reaction involving 1.04 g of MgO. Convert the 0.036 kJ of energy into kJ/mol MgO using ΔH=Q/n?

Answer 1

`"1.40 kJ/mol"`

Explanation:

Molar mass of `"MgO = 40.3 g/mol"`

Moles of `"MgO" = "1.04 g"/"40.3 g/mol" = "0.0258 mol"`

`Δ"H" = "Q"/"n" = "0.036 kJ"/"0.0258 mol" = "1.40 kJ/mol"`