Is this reaction an oxidation reaction or a reduction? al → al3+ + 3e−

An oxidation reaction is a reaction that results in an increase in oxidation number (-1 to +2, for example). A reduction results in a decrease in oxidation number (+3 to +1, for example).

In this problem, Al goes from 0 to 3+, so this is an oxidation reaction.

The answer is 323 g.

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.