The five main sources of renewable energy can be - id4535072, snikergrace

Question

Chemistry: The five main sources of renewable energy can be used to fuel vehicles. select the best answer from the choices provided ot of

snikergrace · Accepted Answer

Answer : The heat of the reaction is, 399.784 kJ

Explanation :

The given balanced chemical reaction is,

$4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)$

First we have to calculate the moles of iron.

$\text{Moles of }Fe=\frac{\text{Mass of }Fe}{\text{Molar mass of }Fe}=\frac{53.99g}{55.8g/mole}=0.968moles$

Now we have to calculate the moles of Fe_2O_3

From the reaction we conclude that,

As, 4 moles of Fe react to give 2 moles of Fe_2O_3

So, 0.968 moles of Fe react to give $\frac{2}{4}\times 0.968=0.484$ moles of Fe_2O_3

Now we have to calculate the heat of the reaction.

As, 1 mole of Fe_2O_3 produce heat = 826.0 kJ

So, 0.484 mole of Fe_2O_3 produce heat = $0.484\times 826.0=399.784kJ$

Therefore, the heat of the reaction is, 399.784 kJ

The five main sources of renewable energy can be used to fuel vehicles.
select the best answer from the choices provided
ot
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