Give reasons :(a) Neither q nor wis a state function butq+w is a state function. (b) The dissociation of ammoniumchloride in water is endothermic still it dissolved in water. (c ) A real crystal has more entropythan an idealcrystal.

Give reasons :(a) Neither q nor wis a state function butq+w is a state

1.	Give reasons :(a) Neither q nor wis a state function butq+w is a state function. (b) The dissociation of ammoniumchloride in water is endothermic still it dissolved in water. (c ) A real crystal has more entropythan an idealcrystal.
Answer» Solution :(a) `q+w = DeltaU` . As `DeltaU` is a STATE FUNCTION,hence`q+w` is a state function. (b) On dissolution,entropy increases , i.e.,`DeltaS` is`+ve` . Though `DeltaH` is`+ve` but if `T DeltaSgt DeltaH ` , then according to the equation ,`DeltaG = DeltaH -T DeltaS , DeltaG` will be -ve. Hence,the process is spontaneous. (C ) A REAL crystal has some disorderdue to presence of DEFECTS whereas ideal crystalhas no disorder. Hence, a real crystal has more entropy than ideal crystal.