contestada

Hydrogen gas reacts with oxygen to form water. 2H2(
g.+O2(
g.→2H2O(
g.ΔH=−483.5kJ Determine the minimum mass of hydrogen gas required to produce 216 kJ of heat.

Respuesta :

Hydrogen and Oxygen are the chemical elements that combine to form water. The mass of hydrogen required to produce minimum of 216 kJ of heat is 1.79 grams.

Given that,

2 H₂ + O₂ [tex]\rightarrow[/tex] H₂O        [tex]\Delta[/tex]H = -483.5 kJ

The negative enthalpy shows that the reaction is exothermic. The exothermic reactions are those in which heat is released.

Now,

  • Calculating the moles of hydrogen = [tex]\begin{aligned}\dfrac{\text{amount of heat released}} {\Delta{\text H}}}\times2\;\text{mol\;H}_2\end{aligned}\end{aligned}[/tex]

  • Calculating the moles of hydrogen = [tex]\begin{aligned}\dfrac{-216\;\text{kJ}} {-483.5\;\text{kJ}}\times2\;\text{mol\;H}_2\end{aligned}[/tex]

  • Calculating the moles of hydrogen = 0.893 moles of H₂

Now,

0.893 mol H₂ x (2.02 g H₂ / 1 mol H₂) = 1.79 g H₂

Therefore, the mass of hydrogen gas is 1.79 g

To know more about enthalpy, refer to the following link:

https://brainly.com/question/21943467?referrer=searchResults

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