The activation energy for the reaction `2 HI(g) rarr H_2 + I_2 (g)` is 209.5 kJ mol^(-1) at 58IK.Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy?

What is the fraction of molecules having energy equal to or greater than activation energy, E_a ? What is this quantity called ?

The enthalpy change for the reaction N2(g) + 3 H2(g) → 2 NH3(g) is -91.8 kJ at 298 K. Calculate the enthalpy of formation of ammonia?

Heat change for a reaction N_(2)(g) + 3H_(2) (g) to 2NH_(3)(g) is - 92.2 kj/mol. Calculate the heat of formation of one mole of a ammonia.

The activation energy of a first order reaction at 300 K is 60 kJ mol^-1 . In the Presence of a Catalyst, the activation energy gets lowered to 50 kJ mol^-1 at 300 K. How many times the reaction rate changes in the Presence of a catalyst at the same temperature ?

The first order rate constant for the decomposition of ethyl iodide by the reaction C_2H_5I(g) rarr C_2H_4 (g) + HI(g) at 600K is 1.60 x 10^(-5) s^(-1) . Its energy of activation is 209 kJ/mol. Calculate the rate constant of the reaction at 700K.

The initial concentration of N_2O_5 in the following first order reaction N_2O_5(g) rarr 2 NO_2(g) + 1/2O_2 (g) was 1.24 x 10^(-2) mol L^(-1) Calculated the rate constant of the reaction at 318 K.

The rate of constant of reaction at 300 K//320 K are 5 xx 10^(-4) s^(-1) and 2.0 xx 10^(-3)s^(-1) respectively. Calculate the value of activation energy of reaction.

Calculate the kinetic energy of 0.2 g of H_2 at 27^@C .