Calculate the enthalpy of the transition S (rhombic) `rarr` S (monoclinic). Given that the enthalpy of cumbustion of rhombic and monoclinic sulphur is -70.97 and -71.02 K cal `mol^(-1)

For the reaction: 2A + B rarr A_2B the rate = k[A][B]^2 with k = 2.0xx10^-6 mol^-2 L^2 s^-1 . Calculate the initial rate of the reaction when [A] = 0.1 mol L^-1 , [b] = 0.2 mol L^-1 . Calculate the rate of reaction after [A] is reduced to 0.06 mol L^-1 .

Represent the cell with cell reaction- Zn(s)+2Ag^+(aq) rarr Zn^(2+) (aq)+2Ag(s) Calculate the emf of the cell at 298K if the molar concentraction of Ag^+ and Zn^(2+) ions in the half cwells are 0.10 mol dm^(-3) and 0.01 mol dm^(-3) respectively. Given that E^@ Ag^+//Ag= 0.80V and E^@Zn^(2+)//Zn=-0.76V,

The rate constant of a reaction at 500K and 700K are 0.01s^-1 and 0.07s^-1 respectively. Calculate the value of activation energy for the reaction (R = 8.314 JK^-1mol^-1).

Consider a certain reaction A rarr Products with k = 2.0x10^-2 s^-1.Calculate the concentration of A after 100s if the initial concentration of A is 1.0 mol L^-1.

The rate constants of a reaction at 500K and 700K are 0.02s^-1 and 0.07s^-1 respectively. Calculate value of activation energy for the reaction. (Given R = 8.314 JK^-1 mol^-1)

When 0.15 kg of ice at 0^@C mixed with 0.30 kg of water at 50^@C in a container, the resutling temperature is 6.7^@C . Calculate the latent heat of fusion of ice. Given S_(water) = 4186J kg^-1 K^-1 .

Calculate the equilibrium constant of the following reaction aty 298K. Cu(s)+2Ag^+(aq) rarr Cu^(2+)(aq)2Ag(s)~ Given E_(cell)^Theta=0.46V

For the reaction, 4NH_3 + 5O_2 rarr 4NO + 6H_2O The rate of formation of No is 3.6xx10^-3 mol L^-1s^-1 Calculate the disappearance of NH_3 and rate of formation of H_2O .

Calculate the standard cell potential of the Galvanic cell in which the following reaction takes place: 2Cr(s) + 3Cd^(2+)(aq) rarr 2Cr^(3+)(aq) + 3Cd(s) Also calculate the DeltarG^@ value of the reaction. (Given: E_(Cr^(3+)//Cr) = -0.74V , E_(Cd^(2+)//Cd) = -0.40V and F =96500C//mol )

For the conversion of 1 mole of SO_2(g) to SO_3(g) the heat of reaction at constant volume ( Delta U^@ ) at 298K is -97.027 KJ Calculate the enthalpy change ( Delta H^@ )