How much energy is evolved during the reaction of 51.2 g of al, according to the reaction below? assume that there is excess fe2o3. fe2o3(s) + 2 al(s) â al2o3(s) + 2 fe(s) î´hâ°rxn = -852 kj?

Answer : The amount of energy evolved during the reaction is, .

Solution : Given,

Mass of Al = 51.2 g

Molar mass of Al = 27 g/mole

First we have to calculate the moles of Al.

The balanced combustion reaction is,

From the given reaction, we conclude that

As, 2 moles of Al evolved energy =

So, 1.896 moles of Al evolved energy =

Therefore, the amount of energy evolved during the reaction is, .

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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