Chemical Kineti...

From the following data: the activation energy for the reaction (cal/mol)  $${ H }_{ 2 }+{ I }_{ 2 }\rightarrow 2HI$$

If the door of a refrigerator is kept open in a dosed room then room:

In the case of a zero-order reaction, the ratio of time required for $$75$$% completion to $$50$$ % completion is:

Which integrated equation is correct for the following $$1^{st}$$ order reaction started with only $$A(g)$$ in a closed rigid vessel?
$$A(g)\rightarrow B(g) + C(g)+ D(g)$$

The half-life for the reaction $$N_2O_5\to 2NO_2+\dfrac{1}{2}O_2$$ is $$2.4h$$ STP
Starting with $$10.8g$$ of $$N_2O_5$$ how much oxygen will be obtained after a peroid of $$9.6h$$?

If the concentration of reactants is reduced by n times then the value of rate constant of the first order will?

For a firt order reaction $$A\to P$$, the temperature (T) dependent rate constant (k) was found to follow the equation $$\log k = -(2000)\dfrac{1}{T}+6.0$$. The pre-exponential factor A and the activation energy $$E_a$$, respectively, are?

The time elapsed of a certain between 33% and 67% completion of a first order reaction is 30 minutes. What is the time needed for 25% completion?

For a reaction $$A \rightarrow B + C$$.. it was found that at the end of $$10$$ minutes from the start, the total optical rotation of the system was $$50^o$$ and when the reaction was completed a was $$100^o$$ Assuming that  "$$A$$" a optically inactive. '$$B$$' dextro rotatory and '$$C$$' is laevo rotatory rate constant of this first order reaction is ?

At $$373\ K$$, a gaseous reaction $$A\rightarrow 2B+C$$ is found to be first order. Starting with pure $$A$$, the total pressure at the end of $$10\ min$$. was $$176\ mm$$ and after a long time when $$A$$ was completely dissociated, it was $$270\ mm$$. The pressure of $$A$$ at the end of $$10$$ minutes was: