Work done by the system in isothermal reversible process is `w_(rev.)= -2.303 nRT “log”(V_(2))/(V_(1))`. Also in case of adiabatic reversible process work done by the system is given by: `w_(rev.) = (nR)/(gamma -1) [T_2 – T_1]`. During expansion disorder increases and the increase in disorder is expressed in terms of change in entropy `DeltaS = q_(rev.)/T`. The entropy changes also occurs during transformation of one state to other end expressed as `DeltaS = DeltaH/T`. Both entropy and enthalpy changes obtained for a process were taken as a measure of spontaniety of process but finally it was recommended that decrease in free energy is responsible for spontaniety and `DeltaG=DeltaH – T DeltaS`.
Which statements are correct? (1) The expansion work for a gas into a vacuum is equal to zero. (2) `1` mole of a gas occupying `3` litre volume on expanding to `15` litre at constant pressure of `1atm` does expansion work `1.215 kJ`. (3) The maximum work done during expansion of `16gO_2` at `300K` from `5dm^3` to `25 dm^3` is `2.01 kJ`. (4) The `DeltaS` for `S to L` is almost negligible in comparision to `DeltaS` for `L to G`. (5) `DeltaS = 2.303 nR “log”(V_(2))/(V_(1)).` (at constant `T`)
A. 2,3,4,5
B. 1,2,3,4,5
C. 1,2
D. 4,5

Work done by the system in isothermal reversible process is `w_(rev.)= -2.303 nRT “log”(V_(2))/(V_(1))`. Also in case of adiabatic reversible process work done by the system is given by: `w_(rev.) = (nR)/(gamma -1) [T_2 – T_1]`. During expansion disorder increases and the increase in disorder is expressed in terms of change in entropy `DeltaS = q_(rev.)/T`. The entropy changes also occurs during transformation of one state to other end expressed as `DeltaS = DeltaH/T`. Both entropy and enthalpy changes obtained for a process were taken as a measure of spontaniety of process but finally it was recommended that decrease in free energy is responsible for spontaniety and `DeltaG=DeltaH – T DeltaS`.
A chemical change will definitely be spontaneous if:
A. `DeltaH=-ve, DeltaS=-ve` and low temperature
B. `DeltaH=+ve, DeltaS=-ve` and high temperature
C. `DeltaH=-ve, DeltaS=+ve` and any temperature
D. `DeltaH=+ve,DeltaS=+ve` and `TDeltaS lt DeltaH`

Work done by the system in isothermal reversible process is `w_(rev.)= -2.303 nRT “log”(V_(2))/(V_(1))`. Also in case of adiabatic reversible process work done by the system is given by: `w_(rev.) = (nR)/(gamma -1) [T_2 – T_1]`. During expansion disorder increases and the increase in disorder is expressed in terms of change in entropy `DeltaS = q_(rev.)/T`. The entropy changes also occurs during transformation of one state to other end expressed as `DeltaS = DeltaH/T`. Both entropy and enthalpy changes obtained for a process were taken as a measure of spontaniety of process but finally it was recommended that decrease in free energy is responsible for spontaniety and `DeltaG=DeltaH – T DeltaS`.
Which statements are correct? (1) The expansion work for a gas into a vacuum is equal to zero. (2) `1` mole of a gas occupying `3` litre volume on expanding to `15` litre at constant pressure of `1atm` does expansion work `1.215 kJ`. (3) The maximum work done during expansion of `16gO_2` at `300K` from `5dm^3` to `25 dm^3` is `2.01 kJ`. (4) The `DeltaS` for `S to L` is almost negligible in comparision to `DeltaS` for `L to G`. (5) `DeltaS = 2.303 nR “log”(V_(2))/(V_(1)).` (at constant `T`)
A. `2,3,4,5`
B. `1,2,3,4,5`
C. `1,2`
D. `4,5`

Work done by the system in isothermal reversible process is `w_(rev.)= -2.303 nRT “log”(V_(2))/(V_(1))`. Also in case of adiabatic reversible process work done by the system is given by: `w_(rev.) = (nR)/(gamma -1) [T_2 – T_1]`. During expansion disorder increases and the increase in disorder is expressed in terms of change in entropy `DeltaS = q_(rev.)/T`. The entropy changes also occurs during transformation of one state to other end expressed as `DeltaS = DeltaH/T`. Both entropy and enthalpy changes obtained for a process were taken as a measure of spontaniety of process but finally it was recommended that decrease in free energy is responsible for spontaniety and `DeltaG=DeltaH – T DeltaS`.
The heat of vaporisation and heat of fusion of `H_2O` are `540 cal//g` and `80 cal//g`. This ratio of `(DeltaS_(vap.))/(DeltaS_(“fusion”))` for water is:
A. `6.75`
B. `9.23`
C. `4.94`
D. `0.2`

Work done by the system in isothermal reversible process is `w_(rev.)= -2.303 nRT “log”(V_(2))/(V_(1))`. Also in case of adiabatic reversible process work done by the system is given by: `w_(rev.) = (nR)/(gamma -1) [T_2 – T_1]`. During expansion disorder increases and the increase in disorder is expressed in terms of change in entropy `DeltaS = q_(rev.)/T`. The entropy changes also occurs during transformation of one state to other end expressed as `DeltaS = DeltaH/T`. Both entropy and enthalpy changes obtained for a process were taken as a measure of spontaniety of process but finally it was recommended that decrease in free energy is responsible for spontaniety and `DeltaG=DeltaH – T DeltaS`.
`Ag_2O_((s)) to 2Ag_((s)) + 1/2 O_(2(g))` attains equilibrium at temperature…`K` is : (The `DeltaH` and `DeltaS` for the reaction are `30.5kJ mol^(-1)` and `66J mol^(-1) K^(-1)` )
A. `462.12`
B. 237
C. 373
D. 273

Work done by the system in isothermal reversible process is `w_(rev.)= -2.303 nRT “log”(V_(2))/(V_(1))`. Also in case of adiabatic reversible process work done by the system is given by: `w_(rev.) = (nR)/(gamma -1) [T_2 – T_1]`. During expansion disorder increases and the increase in disorder is expressed in terms of change in entropy `DeltaS = q_(rev.)/T`. The entropy changes also occurs during transformation of one state to other end expressed as `DeltaS = DeltaH/T`. Both entropy and enthalpy changes obtained for a process were taken as a measure of spontaniety of process but finally it was recommended that decrease in free energy is responsible for spontaniety and `DeltaG=DeltaH – T DeltaS`.
A chemical change will definitely be spontaneous if:
A. `Delta H = -ve, Delta S = -ve` and low temperature
B. `Delta H = +ve, Delta S = -ve` and high temperature
C. `Delta H = -ve, Delta S = +ve` and any temperature
D. `Delta H = +ve, Delta S = +ve` and `T Delta S lt Delta H`