Explanation
Given
Mass of BaO produced = 5.75g
Required: Heat released when BaO is produced
Solution
Step 1: Calculate the energy released per mole of BaO
BaO has a coefficient of 2, meanibg there are 2 moles.
[tex]\begin{gathered} k\text{ = }\frac{-1107\text{ kJ}}{2\text{ moles}} \\ k\text{ = -553.5 kJ/mole} \end{gathered}[/tex]
Step 2: Calculate the number of moles of BaO
n = m/M where n is the moles, m is the mass and M is the molar mass
n = 5.75g/153.33 g/mol
n = 0.0375 mol
Step 3: Calculate the energy released
[tex]\begin{gathered} \delta H=nk \\ \text{ = 0.0375 mol x \lparen-553.5 kJ/mol\rparen} \\ \text{ = -20.76 kJ} \end{gathered}[/tex]
Answer
Energy released = 20.8 kJ
