Respuesta :
Answer:
The balanced chemical equation:
[tex]C_6H_5OH(s)+7O_2(g)\rightarrow 6CO_2(g)+3H_2O(g)[/tex]
Heat of combustion per gram of phenol is 32.454 kJ/g
Heat of combustion per gram of phenol is 3,050 kJ/mol
Explanation:
[tex]C_6H_5OH(s)+7O_2(g)\rightarrow 6CO_2(g)+3H_2O(g)[/tex]
Heat capacity of calorimeter = C = 11.66 kJ/°C
Initial temperature of the calorimeter = [tex]T_1= 21.36^oC[/tex]
Final temperature of the calorimeter = [tex]T_2= 26.37^oC[/tex]
Heat absorbed by calorimeter = Q
[tex]Q=C\times \Delta T[/tex]
Heat released during reaction = Q'
Q' = -Q ( law of conservation of energy)
Energy released on combustion of 1.800 grams of phenol = Q' = -(58.4166 kJ)
Heat of combustion per gram of phenol:
[tex]\frac{Q'}{1.800 g}=\frac{-58.4166 kJ}{1.800 g}=32.454 kJ/g[/tex]
Molar mass of phenol = 94 g/mol
Heat of combustion per gram of phenol:
[tex]\frac{Q'}{\frac{1.800 g}{94 g/mol}}=\frac{-58.4166 kJ\times 94 g/mol}{1.800 g}=3,050 kJ/mol[/tex]
