Is this equation completely balanced? 2C8H8 + 25O2 8CO2 + 18H2O
2 answers:
Answer: Option (A) is the correct answer.
Explanation:
For an equation to be completely balanced, there should be equal number of reactants and products.
In the given equation.
Number of carbon atoms on reactant side = 16
Number of hydrogen atoms on reactant side = 16
Number of oxygen atoms on reactant side = 50
Number of carbon atoms on product side = 8
Number of hydrogen atoms on product side = 36
Number of oxygen atoms on product side = 34
Hence, we can conclude that total number of reactants does not equal total number of products therefore, this equation is not completely balanced.
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Answer: The entropy change of the surroundings will be -17.7 J/K mol.
Explanation: The enthalpy of vapourization for 1 mole of acetone is 31.3 kJ/mol
Amount of Acetone given = 10.8 g
Number of moles is calculated by using the formula:
Molar mass of acetone = 58 g/mol
Number of moles =
If 1 mole of acetone has 32.3 kJ/mol of enthalpy, then
0.1862 moles will have =
To calculate the entropy change for the system, we use the formula:
Temperature = 56.2°C = (273 + 56.2)K = 329.2K
Putting values in above equation, we get
(Conversion Factor: 1 kJ = 1000J)
At Boiling point, the liquid phase and gaseous phase of acetone are in equilibrium. Hence,