Question

Water decomposes to O₂ and H₂ under suitable conditions, as represented by the equation below:

\[\ce{2H2O -> 2H2 + O2}\]

Taking the volume of H₂ calculated in 5(b), what changes must be made in kelvin (absolute) temperature to return the volume to 2500 cm³ pressure remaining constant?

Answer 1

V₁ = `5000/7`cm³

V₂ = 2500 cm³

∴ T₂ = `"V"_2/"V"_1 xx "T"_1`

= `(2500 xx 7)/50` T₁

= 3.5 T₁

∴ T₂ is increased to 3.5 times.