Find the volume of hydrogen that is formed during the dehydrogenation of 42 g

Find the volume of hydrogen that is formed during the dehydrogenation of 42 g of cyclohexane if the product yield is 80%.

Let’s execute the solution:

According to the condition of the problem, we compose the equation of the process:
C6H12 = 3H2 + C6H6 – dehydrogenation of cyclohexane, obtained hydrogen, benzene;

Calculations:
M (C6H12) = 84 g / mol;

M (H2) = 2 g / mol;

Y (C6H12) = m / M = 42/84 = 0.5 mol.

Proportion:
0.5 mol (C6H12) – X mol (H2);

-1 mol -3 mol from here, X mol (H2) = 0.5 * 3/1 = 1.5 mol.

Find the volume of the product:
V (H2) = 1.5 * 22.4 = 33.6 l (theoretical volume);

V (H2) = 0.80 * 33.6 = 26.88 l (practical volume).

Answer: hydrogen produced with a volume of 26.88 liters