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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?
Numerical
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Solution
Given: Initial Volume of H2 at STP (V) = 2500 cm3
V1 = `5000/7`cm3
V2 = 2500 cm3
Formula: T2 = `V_2/V_1 xx T_1`
∴ T2 = `(2500 xx 7)/5000 xx T_1`
= 3.5 T1
∴ T2 is increased to 3.5 times.
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Standard Temperature Pressure (S.T.P.)
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