Answer: The amount of heat released for the given amount of hydrogen peroxide is 14.7 kJ.
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
Given mass of [tex]H_2O_2[/tex] = 5.00 g
Molar mass of [tex]H_2O_2[/tex] = 34 g/mol
Putting values in above equation, we get:
[tex]\text{Moles of }H_2O_2=\frac{5.00g}{34g/mol}=0.15mol[/tex]
The chemical equation for the reaction of decomposition of hydrogen peroxide follows:
[tex]2H_2O_2(l)\rightarrow 2H_2O(l)+O_2(g);\Delta H=-196kJ[/tex]
By Stoichiometry of the reaction:
For every 2 moles of hydrogen peroxide, the amount of heat released is 196 kJ.
So, for every 0.15 moles of hydrogen peroxide, the amount of heat released will be = [tex]\frac{196}{2}\times 0.15=14.7kJ[/tex]
Hence, the amount of heat released for the given amount of hydrogen peroxide is 14.7 kJ.
