1.

Correct statements are-

Answer»

`A+B to D,DELTAH=xkJ`. This REACTION is performed in the following two steps: (i) `A+B to C`
(ii) `CtoD`. If in step (i) `DeltaH =ykJ`, then `DeltaH=(x-y)J` in step (ii)
For a spontaneous process occuring in an isolated system `DeltaS_(sys) gt0` at equilibrium
in a spontaneous chemical reaction at CONSTANT temperature and pressure, `DeltaG=-TDeltaS_("surr")`
in a chemical reaction `DeltaH gt0 and DELTAS gt0`. The reaction attains equilibrium at temperature, `T_(c)`. At constant pressure and constant temperature TK the reaction will be spontaneous, if `T gt T_(c)`.

Answer :A::D


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