1.

The thermal decomposition of HCO_(2)H is a first order reaction with a rate constant of 2.4xx10^(-3)s^(-1) at a certain temperature. Calculate how long will it take for three-fourths of initial quantity of HCO_(2)H to decompose (log0.25=-0.6021).

Answer»


SOLUTION :`x=(3)/(4)a,t=(2.303)/(k)LOG""(a)/(a-3//4a)=(2.303)/(2.4xx10^(-3))log4s=(2.303)/(2.4xx10^(-3))(0.6021)s=9" MIN "38" s"`
or `t_(1//2)=(0.693)/(k)=(0.693)/(24xx10^(-3))s=288.75s,t_(3//4)=2xxt_(1//2)`


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