(a)
Interpretation:
The balanced chemical equation for the reaction of aluminium and water has to be given.
Concept introduction:
- Balanced chemical equation of a reaction is written according to law of conservation of mass.
- Stoichiometry of a
chemical reaction is the relation between reactants and products of the reaction and it is represented by the coefficients used for the reactants and products involved in the chemical equation.
(b)
Interpretation:
The standard free energy change, standard enthalpy change and standard entropy change for the given reaction has to be given.
Concept introduction:
The Gibbs free energy or the free energy change is a
Here,
(c)
Interpretation:
Aluminum metal is unaffected by water. The reason behind this has to be explained.
Concept introduction:
Aluminium has a chemical property that, it reacts with oxygen to form an oxide. The aluminium oxide is strong and it is unaffected by water.
The reaction occurred in this process is,
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Chemistry & Chemical Reactivity
- Data are given in Appendix 1 for white phosphorus, P4(s). P4(g) has the following thermodynamic values: Hf=58.9kJ/mol , S=280.0J/kmol . What is the temperature at which white phosphorus sublimes at 1 atm pressure?arrow_forwardUsing data in Appendix 1, estimate the temperature at which Fe2O3 can be reduced to iron, using hydrogen gas as a reducing agent (assume H2O(g) is the other product).arrow_forwardCalcium metal can be obtained by the direct electrolysis of molten CaCl2, at a voltage of 3.2 V. (a) How many joules of electrical energy are required to obtain 12.0 1b of calcium? (b) What is the cost of the electrical energy obtained in (a) if electrical energy is sold at the rate of nine cents per kilowatt hour?arrow_forward
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