How do i work out the standard molar entropy of iron(iii) oxide from the data booklet?
To work out the standard molar entropy of iron(III) oxide (Fe2O3) from the data booklet, you need to follow these steps:
1. Look for the formula of iron(III) oxide (Fe2O3) in the data booklet. It should provide you with the molar mass of the compound.
2. Calculate the number of moles of iron(III) oxide (Fe2O3) you have. This can be done by dividing the given mass of the compound by its molar mass.
3. Once you have the number of moles, locate the values for standard molar entropy in the data booklet. The standard molar entropy of elements and compounds are usually given in units of J/(mol·K) or cal/(mol·K).
4. Look for iron (Fe) and oxygen (O2) in the data booklet, and find their respective standard molar entropy values.
5. Multiply the number of moles of each element in iron(III) oxide by their respective standard molar entropies.
6. Since the formula of iron(III) oxide is Fe2O3, you will need to consider the stoichiometry of the reaction. Multiply the standard molar entropy of each element by the stoichiometric coefficient in the balanced equation. In this case, iron has a coefficient of 2 and oxygen has a coefficient of 3.
7. Sum up the products of step 6 to obtain the total standard molar entropy of iron(III) oxide.
It is important to note that the standard molar entropy values provided in the data booklet may vary depending on the source and edition. Therefore, make sure to check the data booklet you have for accurate values.