Acetylene torches are used for welding, but the thermite reaction can be useful in situations in which acetylene torches are inappropriate, such as welding underwater. the thermite reaction is described by the equation below: a welder has 1.873 × 102 g fe2o3 and 94.51 g al in his welding kit. which reactant will he run out of first?

The Thermite Reaction is

The conversions are

mass to moles to moles Fe to mass Fe

=131 g Fe is obtained

mass Al to moles Al to moles Fe to mass Fe

=196 g Fe is obtained

The reactant which runs out first is called as Limiting reactant.

Less mass of the Product is obtained from the limiting reactant.

So we see here  produces less product (131g Fe) than the product produced by Al (196 g Fe)

Hence (Answer) is the Limiting reactant and it runs out first

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.