a) Name the instrument used for measuring the `DeltaU` of a process.
b) What is the value of `DeltaG` for a reaction at equilibrium?
c) `DeltaH` and `DeltaS` of a reaction are 30.56 and 0.666 kJ/mol respectively at 1 atm pressure. Calculate the temperature at which the reaction is in equilibrium.

For the reaction Ag_2O -> 2Ag+ frac{1}{2} O_2 (g) DeltaS and Delta H are 6.66J K^-1mol^-1 and 30.56 kJ mol^-1 respectively. The reaction will not be spontaneous at what temperature

Delta H and DeltaS for the reaction Ag_2O (s) iff 2Ag(s)+ 1/2O_2(g) are 30.56 kJ mol^-1 and 66.0 JK^-1 respectively. Calculate the temperature at which the reaction would be at equilibrium. Also predict the direction of the reaction above this temperature.

The equilibrium constant for a reaction is 8. What will be the value of DeltaG_Theta at 27 degree C?

a) Explain the effect of temperature on the spontaneity of a process based on Gibbs equation. b) For a reaction 2A(g)+B(g)rightarrow2D(g) , enthalpy and entropy changes are - 20.5 kJ mol^-1 and -50.4 J K^-1mol^-1 respectively. Predict whether the reaction occurs at 25^oC.

At what temperature does the reduction of lead oxide to lead by carbon becomes spontaneous? PbO + C rarr Pb(s) + CO(g) . For the reaction DeltaH and DeltaS are 108.4 kJ mol^-1 and 190 kJ^-1 mol^-1 respectively/

Most of the naturally occurring processes are spontaneous. a) Give the criteria for spontaneity of a process in terms of free energy change ( DeltaG ) b) Exothermic reactions associated with a decrease in entropy are sponaneous at lower temperatures. Justify on the basis of Gibbs equation. c) Find the temperature above which the reactin MgO_((s))+C_((s))rightarrow Mg_((s))+CO_((g)) becomes spontaneous. (Given ( Delta_rH^theta=490kJmol^-1 & Delta_rS^theta=198JK mol^-1 )